Welcome to a world where two beloved flavors collide to create an extraordinary treat: our Peanut Butter M&M Blondies. These delightful bars are the epitome of sweet, nutty, and tender perfection, guaranteed to become a new favorite in your household. Crafted to be ready in under 30 minutes, they’re the ultimate solution for a quick dessert craving or an impressive last-minute treat. Each bite offers a harmonious blend of rich, creamy peanut butter and the satisfying crunch of peanut butter M&Ms, all encased in a deliciously gooey and chewy cookie bar texture. It’s an irresistible combination that brings joy to kids and adults alike, making them a staple for any gathering or a simple indulgence on a quiet afternoon. Prepare to fall in love with these easy-to-make, utterly delicious blondie bars!

Peanut Butter M&M Blondies: The Ultimate Chewy, Nutty Treat You Need to Bake
Elevating the beloved classic blondie to new heights, our Peanut Butter M&M Blondies are a game-changer for dessert enthusiasts. We’ve infused them with generous swirls of creamy peanut butter and studded them with vibrant, crunchy peanut butter M&M candies, creating a flavor explosion in every bite. What truly sets these bars apart is our secret ingredient: extra egg yolks, which contribute to an unbelievably moist and tender texture that literally melts in your mouth. These bars come together effortlessly with common pantry staples, making them a go-to recipe for any occasion. Whether you’re scrambling for a last-minute dessert for an impromptu gathering, seeking a reliable crowd-pleaser for a party, or simply craving a satisfying snack, these Peanut Butter M&M Blondies are guaranteed to delight and impress.

The Secret to Irresistibly Tender Blondies: Extra Egg Yolks for Unmatched Richness
If you’ve ever wondered how to achieve that coveted super tender, melt-in-your-mouth texture in blondies, the answer lies in our secret ingredient: extra egg yolks. While many blondie recipes call for whole eggs, incorporating additional yolks into the batter is a transformative step. These golden gems are powerhouses of richness, contributing an unparalleled depth of flavor and moisture. They act as a natural binding agent, helping to hold the bars together beautifully without making them dense or cakey – a common pitfall with less balanced recipes. If your previous blondie experiences have left you with a more cake-like consistency, you’ll be astonished by the profound difference the extra egg yolks make. Not only do they enhance the texture and flavor, but they also contribute to the remarkable longevity of these Peanut Butter M&M Blondies; they remain delightfully soft and fresh for days, even when stored at room temperature without refrigeration. It’s a simple trick that yields extraordinary results, ensuring every bite is as luxurious as the last.
Peanut Butter M&M Blondies Recipe Card
These ultimate Peanut Butter M&M Blondies are bursting with creamy peanut butter and delightful peanut butter M&M’s. They deliver an exquisite balance of sweetness, nuttiness, and a super tender, chewy texture that everyone will adore! A perfect dessert bar for any occasion, these treats are surprisingly quick to prepare, being ready in under 30 minutes from start to finish. Get ready to bake a batch of pure happiness!
Recipe Overview:
- Prep Time: 10 minutes
- Cook Time: 16-18 minutes
- Total Time: Approximately 26-28 minutes
- Yields: 16 generous bars
Ingredients for your Peanut Butter M&M Blondies
- 2¾ cups all-purpose flour
- 1¼ teaspoons baking soda
- 1¼ cups packed brown sugar (light or dark brown sugar works well)
- ½ cup granulated sugar
- ½ cup salted butter, melted (equivalent to 1 stick)
- ⅓ cup vegetable oil (or another neutral-flavored oil)
- 1 large egg
- 2 large egg yolks
- 1 teaspoon pure vanilla extract
- 1 cup peanut butter M&M’s, plus extra for topping
- ½ cup creamy peanut butter* (smooth is recommended for best texture)
Essential Equipment You’ll Need
- 9×13-inch Baking Pan
- Large Mixing Bowls (you’ll need at least two)
- Whisk (for dry and wet ingredients)
- Spatula or Wooden Spoon (for mixing and folding)
- Measuring Cups and Spoons (for accurate ingredient portions)
- Kitchen Scale (optional, but highly recommended for precise flour measurement)
Instructions for Crafting the Perfect Peanut Butter M&M Blondies
- Prepare Your Baking Pan & Preheat Oven: Begin by preheating your oven to a precise 350°F (175°C). This ensures your oven is at the perfect temperature when your batter is ready, which is vital for even baking. Take a 9×13-inch baking pan and generously spray the bottom and sides with baking spray. Alternatively, you can grease it with butter and dust lightly with flour to prevent sticking and ensure easy release. Set this prepared pan aside.
- Combine Dry Ingredients: In a medium-sized mixing bowl, meticulously whisk together the 2¾ cups of all-purpose flour and 1¼ teaspoons of baking soda. Whisking ensures that the baking soda is uniformly distributed throughout the flour, contributing to a consistent rise and texture in your finished blondies. Once thoroughly combined, set this bowl aside for later use.
- Whisk Wet Ingredients: In a separate, larger mixing bowl, combine the ½ cup of melted salted butter, ⅓ cup of vegetable oil, 1¼ cups of packed brown sugar, and ½ cup of granulated sugar. Whisk these ingredients vigorously until the mixture is smooth, glossy, and well-emulsified. The combination of both sugars along with the fats is key to achieving the blondies’ signature chewy texture and deep, caramel-like notes.
- Add Eggs and Vanilla: To the whisked wet mixture, add the single large egg, the two large egg yolks, and 1 teaspoon of pure vanilla extract. Stir everything together thoroughly until all components are fully integrated and the mixture takes on a beautifully uniform appearance. Remember, the additional egg yolks are the secret weapon behind the blondies’ unparalleled tender and rich consistency.
- Gently Combine Wet and Dry: Gradually add the reserved whisked flour mixture to the large bowl containing the wet ingredients. Using a sturdy spatula or a wooden spoon, mix gently until the flour is just incorporated into the wet mixture. It’s crucial not to overmix the batter at this stage; overmixing can develop the gluten in the flour, leading to tough, cake-like blondies instead of the desired soft and chewy texture. A few visible streaks of flour are perfectly acceptable.
- Fold in Flavorful Additions: Once the flour is mostly mixed in, gently fold in 1 cup of the peanut butter M&M’s until they are evenly distributed throughout the batter. Finally, add the ½ cup of creamy peanut butter and stir just until it’s swirled through the batter. The goal is to create delicious pockets of intense peanut butter flavor, not to fully homogenize the mix.
- Transfer and Top: Carefully transfer the rich, M&M-studded peanut butter blondie batter into your prepared 9×13-inch baking pan. Use your spatula to spread the batter evenly into all corners of the pan, ensuring a consistent thickness. For an extra pop of color, visual appeal, and a delightful boost of candy crunch, generously sprinkle additional peanut butter M&M’s over the entire surface of the batter before baking.
- Bake to Perfection: Place the pan into your preheated oven and bake for approximately 16-18 minutes. Keep a vigilant eye on them: the edges of the blondies should turn a beautiful golden brown. Crucially, the very center of the blondies will likely still appear soft, slightly moist, and might even wobble a bit when gently shaken. This “underbaked” appearance in the middle is precisely what you’re aiming for to achieve that perfectly gooey and intensely chewy blondie texture. Do not be tempted to overbake, as the residual heat will continue to cook them as they cool.
- Cool Completely and Serve: Once baked, carefully remove the blondie bars from the oven. Allow them to cool completely in the pan on a wire rack. This cooling period is absolutely vital; as they cool, the center of the bars will naturally set and firm up, developing that characteristic dense, fudgy, and chewy blondie texture. Resist the urge to cut into warm blondies, as this can result in crumbly, messy squares. Once thoroughly cooled, which might take an hour or two depending on your environment, slice the blondies into 16 even squares. Now they are perfectly ready to serve and be devoured! These make a fantastic treat for parties, school lunchboxes, or a simple indulgence with a glass of cold milk or a scoop of creamy vanilla ice cream.
Chef’s Notes & Tips for Baking the Best Peanut Butter M&M Blondies
- *Feel free to use your favorite creamy peanut butter for this recipe. For those mindful of sugar intake, a sugar-free peanut butter can be successfully substituted, though it might subtly influence the overall sweetness and final texture of the blondies.
- Don’t Let Egg Whites Go to Waste: You’ll have two egg whites leftover from this recipe. Don’t discard them! They’re perfect for other delicious recipes such as a light meringue, delicate macarons, a fluffy omelet, or even a batch of homemade marshmallow fluff!
- Achieve Even Baking: To ensure your blondies bake uniformly and are easy to cut into neat squares, always make sure to pat the batter evenly into your prepared baking dish. A consistent thickness across the pan is key.
- The Allure of Extra M&M’s: For an extra burst of vibrant color, delightful crunch, and an undeniable boost of chocolate-peanut butter flavor, don’t shy away from scattering additional peanut butter M&M’s generously over the top of the batter just before it goes into the oven.
- The Golden Rule: Do Not Overbake: This is arguably the most critical tip for blondies. The center of your bars should remain wonderfully chewy and moist, never dry or cakey. They should still appear slightly soft, even “underbaked,” in the middle when you remove them from the oven. This soft center will continue to set and firm up beautifully as the blondies cool, yielding that perfectly gooey texture. Overbaking is the quickest way to ruin the ideal blondie consistency.
- Patience is a Virtue: Cool Completely: Resist the tempting urge to slice into warm blondies. Cooling them completely in the pan allows them to fully set, making for impeccably clean, neat squares and significantly enhancing their dense, chewy texture.
Nutritional Information for Peanut Butter M&M Blondies
Approximate Amount Per Serving (1 bar)
- Calories: 336
- Total Fat: 13g (20% Daily Value)
- Saturated Fat: 7g (44% Daily Value)
- Trans Fat: 1g
- Polyunsaturated Fat: 1g
- Monounsaturated Fat: 3g
- Cholesterol: 37mg (12% Daily Value)
- Sodium: 259mg (11% Daily Value)
- Potassium: 115mg (3% Daily Value)
- Total Carbohydrates: 50g (17% Daily Value)
- Dietary Fiber: 1g (4% Daily Value)
- Total Sugar: 32g (36% Daily Value)
- Protein: 6g (12% Daily Value)
- Vitamin A: 89IU (2% Daily Value)
- Vitamin C: 1mg (1% Daily Value)
- Calcium: 49mg (5% Daily Value)
- Iron: 2mg (11% Daily Value)
* Percent Daily Values are based on a 2000 calorie diet. Nutritional information is an estimate.
Recipe Author: Becky Hardin
Have You Baked These Blondies?
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Crafting Your Peanut Butter M&M Blondies: A Detailed Step-by-Step Guide
Creating these irresistibly chewy and flavorful Peanut Butter M&M Blondies is an enjoyable process, perfectly manageable for bakers of all skill levels, even those new to the kitchen. The key to success lies in careful preparation and understanding the delicate balance required to avoid overbaking. Follow these detailed steps, complete with expert tips, to ensure you achieve a batch of blondies that are nothing short of perfection every single time.
Step 1: Get Ready to Bake – Preheat Oven and Prepare Your Pan
Your baking journey begins with crucial preparatory steps. First, preheat your oven to a precise 350°F (175°C). A properly preheated oven is fundamental for even baking and achieving the desired texture in your blondies. Next, select a 9×13-inch baking pan. Generously spray the bottom and sides with baking spray, or alternatively, grease it thoroughly with butter and dust lightly with all-purpose flour. This crucial step prevents the blondies from sticking and ensures effortless removal once cooled. Set this prepared pan aside. While gathering your ingredients, gently melt your ½ cup of salted butter. This can be done in a small saucepan over very low heat, or conveniently in the microwave in short 30-second bursts, stirring in between. Be vigilant not to brown the butter; you just want it melted and fluid.

Step 2: Whisk Together the Dry Ingredients for Uniformity
In a medium-sized mixing bowl, combine 2¾ cups of all-purpose flour with 1¼ teaspoons of baking soda. This isn’t just a simple mix; take a whisk and thoroughly blend these dry ingredients together. The purpose of this step is vital: it ensures that the baking soda, which acts as the leavening agent, is perfectly and evenly distributed throughout the flour. This uniform distribution is essential for a consistent rise and a tender, even crumb in your blondies. Once thoroughly combined, set this bowl aside so it’s ready to be added to your wet ingredients.

Step 3: Combine the Wet Ingredients to Form a Rich, Chewy Base
Now, shift your attention to a large mixing bowl. Here, you’ll combine the ½ cup of melted salted butter and ⅓ cup of vegetable oil with 1¼ cups of packed brown sugar and ½ cup of granulated sugar. Whisk these ingredients together vigorously until the mixture is beautifully smooth, glossy, and fully emulsified. The thoughtful combination of both brown and granulated sugars, along with the melted fats, is the cornerstone for developing the blondies’ characteristic incredible chewiness and a deep, nuanced caramel-like flavor. Next, incorporate the single large egg, two large egg yolks, and 1 teaspoon of pure vanilla extract. Stir everything together until it’s perfectly well incorporated and the mixture appears uniform. As previously highlighted, those two extra egg yolks are the secret behind the blondies’ signature ultra-tender, melt-in-your-mouth consistency, adding richness without making them heavy.

Step 4: Gently Mix Batter and Thoughtfully Fold in Flavorful Additions
With your wet ingredients perfectly blended, it’s time to bring everything together. Pour the reserved dry flour mixture into the large bowl containing the wet ingredients. Using a sturdy spatula or a wooden spoon, begin to stir gently until the flour is *just* incorporated into the wet mixture. This is a critical moment in blondie making: be extremely careful not to overmix the batter. Overmixing can cause the gluten in the flour to develop excessively, which results in tough, dense, and disappointingly cakey blondies, rather than the desired soft, gooey, and supremely chewy texture. It’s perfectly fine if you see a few small streaks of flour remaining – they will disappear during baking. Once the flour is mostly mixed, gently fold in 1 cup of the colorful peanut butter M&M’s until they are evenly distributed throughout the batter. Finally, add the ½ cup of creamy peanut butter and stir just until it’s swirled through the batter. The aim here is to create pockets of intense peanut butter flavor, rather than achieving a fully homogenous mix.

Step 5: Bake to Perfection and Watch for Golden Edges
Now, carefully transfer the rich, M&M-studded peanut butter blondie batter into your meticulously prepared 9×13-inch baking pan. Use your spatula to spread the batter evenly into all corners of the pan, ensuring a consistent thickness from edge to edge. For an extra pop of vibrant color, an enhanced visual appeal, and a delightful boost of candy crunch, generously scatter additional peanut butter M&M’s over the entire surface of the batter before placing it in the oven. Slide the pan into your preheated oven and bake for approximately 16-18 minutes. During this time, keep a close eye on them: the edges of the blondies should turn a beautiful, inviting golden brown. Critically, the very center of the blondies will likely still appear quite soft, somewhat moist, and might even wobble slightly when the pan is gently shaken. This “underbaked” or “gooey” appearance in the middle is precisely what you’re striving for to achieve that perfectly fudgy, intensely chewy, and moist blondie texture. Resist the strong temptation to overbake them, as they will continue to set and firm up beautifully as they cool outside the oven.
Step 6: Cool Completely Before Slicing and Serving Your Delicious Blondies
Once your irresistible blondie bars emerge from the oven, remove them immediately. Now, the most challenging part (but arguably the most important for perfect results) begins: allowing them to cool completely. Place the entire pan on a wire rack and let the blondies cool fully. This cooling period is absolutely vital. As they cool, the slightly soft center of the bars will naturally set, firm up, and develop that characteristic dense, fudgy, and intensely chewy blondie texture. Attempting to cut them while they are still warm will almost certainly result in crumbly, messy, and less-than-perfect squares. Be patient; thorough cooling might take anywhere from one to two hours, depending on the ambient temperature. Once they are completely cooled to room temperature, you can confidently slice the blondies into 16 even squares. Now, they are perfectly ready to serve and be savored! These make a fantastic treat for family gatherings, school lunchboxes, an office party, or simply as a delightful indulgence with a cold glass of milk or a scoop of creamy vanilla ice cream.

Optimal Storage, Freezing, and Reheating Solutions for Your Blondie Bars
Ensuring the proper storage of your Peanut Butter M&M Blondies is crucial to maintaining their delightful freshness and incredible flavor for as long as possible. These bars are remarkably moist and forgiving, making them an excellent candidate for making ahead, preparing for events, or simply enjoying over several days.
Storing at Room Temperature for Immediate Enjoyment
For blondies destined for immediate gratification or consumption within a few days, store any leftovers in an airtight container at room temperature. They will retain their wonderful freshness, chewiness, and moist texture for up to 3 days. The key is to ensure the container is sealed tightly; this prevents air exposure, which can dry out the blondies and compromise their desired texture.
Refrigeration for Extended Freshness
If you wish to significantly extend the shelf life of your blondies, placing them in an airtight container in the refrigerator is your best bet. When refrigerated, these delicious bars will stay perfectly fresh for up to 1 week. When you’re ready to indulge, you have a couple of options: you can either allow them to slowly come to room temperature for a softer, more classic bite, or for that irresistible warm, gooey, freshly-baked sensation, gently warm them in the microwave for a few seconds. Be cautious not to overheat, which can dry them out.
Freezing for Long-Term Enjoyment and Future Cravings
One of the fantastic qualities of these blondies is how beautifully they freeze, allowing you to enjoy them months down the line! To prepare them for freezing, first ensure the baked bars have cooled completely to room temperature. Then, slice them into individual squares. For optimal preservation and to prevent freezer burn, wrap each individual square tightly in plastic wrap. After wrapping, place the individually wrapped blondie squares into a larger freezer-safe airtight container or a heavy-duty freezer bag. They can be safely stored in the freezer for up to 3 months without compromising quality. When a craving strikes or you need a quick dessert, simply transfer the desired number of frozen blondies to the refrigerator and let them thaw overnight. Once thawed, you can enjoy them at room temperature or, for a truly decadent experience, warm them slightly in the microwave to bring back that delightful warmth and gooey center.
Frequently Asked Questions (FAQs) About Peanut Butter M&M Blondies
Q: What is the fundamental difference between a blondie and a brownie?
A: The primary distinction between blondies and brownies lies in their core flavor profile. Brownies are famously rich in chocolate, deriving their signature taste from cocoa powder or melted chocolate. Blondies, often affectionately referred to as “blonde brownies,” omit the chocolate in their base. Instead, their rich, complex flavor comes predominantly from brown sugar and butter, which often gives them a caramel-like depth. They typically feature other delicious mix-ins, such as nuts, white chocolate chips, or, in the case of this recipe, the irresistible combination of peanut butter and M&M’s.
Q: Can I substitute different types of M&M’s or other mix-ins in this recipe?
A: Absolutely! While peanut butter M&M’s are an incredible complement to the blondies’ nutty flavor, feel completely free to get creative and experiment with other varieties. Classic plain M&M’s, crunchy peanut M&M’s, or even festive seasonal M&M’s would all be wonderfully delicious additions. If you want to explore beyond M&M’s, consider swapping them out for chocolate chips (milk, semi-sweet, or dark), butterscotch chips, white chocolate chips, or even chopped nuts like walnuts or pecans for an added layer of texture and flavor.
Q: Is it necessary to chill the dough before baking these blondies?
A: No, this particular blondie recipe is designed for maximum convenience and does not require chilling the dough before baking. The use of melted butter and vegetable oil in the batter helps keep it perfectly pliable and easy to spread directly into the pan, allowing for a quick and straightforward baking process without any waiting time.
Q: How can I tell when my blondies are perfectly baked and not overdone?
A: Identifying perfectly baked blondies is key to their success. Look for edges that have turned a beautiful, inviting golden brown. The critical indicator, however, is the center: it should still appear slightly soft, possibly even a bit moist, and might gently wobble when you carefully shake the pan. This “underbaked” appearance in the center is precisely what you want to achieve that supremely moist, gooey, and chewy texture. A simple test with a toothpick inserted into the center should yield moist crumbs clinging to it, not wet batter. Remember, overbaking is the quickest way to end up with dry, cake-like blondies instead of the desired fudgy, moist ones.
Q: Why are egg yolks specifically highlighted as important in this blondie recipe?
A: The inclusion of extra egg yolks in this recipe is truly a game-changer! They are crucial because they impart significant richness, deep moisture, and an unparalleled tenderness to the blondies. This contributes to that highly desirable melt-in-your-mouth texture without making the bars overly dense or cakey. Furthermore, egg yolks act as excellent natural emulsifiers and binders, helping to create a more cohesive and fudgier consistency in the final product.
Q: Can I adapt this blondie recipe to be gluten-free?
A: Yes, it is generally possible to make these blondies gluten-free. While this recipe specifically calls for all-purpose flour, you can typically substitute it with a high-quality 1:1 gluten-free baking flour blend that already contains xanthan gum. When making this modification, be aware that there might be slight variations in the final texture compared to the original recipe, but it is a widely used and successful adaptation for those with gluten sensitivities or dietary restrictions.
Q: What’s the best method to prevent my blondies from sticking to the baking pan?
A: The most effective way to prevent your delicious blondies from sticking to the pan is to ensure thorough preparation of your baking dish. Start by generously greasing your 9×13-inch pan with baking spray, butter, or shortening, followed by a light dusting of all-purpose flour. For an added layer of assurance and exceptionally easy removal, we highly recommend lining the pan with parchment paper. Leave a generous overhang on the sides of the parchment paper; this creates convenient “handles” that allow you to easily lift the completely cooled blondies out of the pan before slicing them.
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