The Ultimate Easy & Eggless Key Lime Pie Recipe
If you’re wondering what the quintessential taste of summer is, look no further than Key Lime Pie. This dessert is a symphony of flavors – incredibly fresh, zesty, creamy, and utterly delicious! Its vibrant tang, perfectly balanced with a rich, buttery graham cracker crust, makes it an irresistible treat. What if I told you that crafting this iconic pie could be surprisingly simple? My homemade Key Lime Pie recipe requires just 6 core ingredients, is completely eggless, and takes only about 30 minutes of active prep and bake time. The most challenging part, undoubtedly, is patiently waiting for it to chill to perfection!

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Effortlessly Delicious: The Easy Key Lime Pie Recipe
Embrace the vibrant, floral notes of genuine Key Limes with this incredibly simple Key Lime Pie recipe. Their distinct tartness truly shines through, creating a rich, creamy, and wonderfully tangy dessert when combined with sweetened condensed milk. To perfectly complement the zesty filling, my 3-ingredient graham cracker crust adds just the right amount of buttery sweetness.
Unlike traditional recipes that often rely on eggs to create a custard-like filling, this recipe ingeniously uses sour cream for thickening. The result is a filling that’s just as rich and creamy, but without the need for a single egg. This not only simplifies the baking process but also offers a cost-effective solution, which is a welcome bonus!
A Brief History of Key Lime Pie
The origins of Key Lime Pie are deeply rooted in the Florida Keys. Legend has it that the recipe was developed by local sponge fishermen who used readily available ingredients: Key limes, condensed milk (a staple before refrigeration), and eggs. Over time, particularly with the rise of tourism, the pie became synonymous with the region’s culinary identity. Its popularity spread, establishing it as a beloved American classic, especially favored during the warmer months for its refreshing qualities.

Understanding Limes: Key Limes vs. Regular Limes
While you might be tempted to use any lime, there’s a reason Key limes hold a special place in this pie. Key limes are notably smaller and possess a more intense, aromatic, and distinctly floral flavor compared to the larger, more common Persian limes (also known as Tahitian limes). Their unique acidity and fragrance are what give Key Lime Pie its signature taste.
If genuine Key limes or bottled Key lime juice are not available in your area, don’t despair! You can absolutely use regular Persian lime juice as a substitute. The pie will still be delicious, though the flavor profile will be slightly different – perhaps a bit less floral and more straightforwardly tart. For the best result, always opt for freshly squeezed juice, regardless of the lime variety, as this greatly enhances the pie’s freshness.

Classic Key Lime Pie Recipe (Eggless & Easy)
Ingredients
For the Crust*
- 1½ cups graham cracker crumbs (about 12 whole cracker sheets)
- ⅓ cup granulated sugar
- 6 tablespoons unsalted butter melted (¾ stick)
For the Filling
- 28 ounces sweetened condensed milk (2 cans)
- ½ cup sour cream
- ¾ cup key lime juice (from about 8 key limes)
- ½ tablespoon grated lime zest (from 1 key lime)
- Whipped cream optional, for serving
- Lime slices optional, for garnish
Equipment
- Kitchen Scale (optional)
- 9-inch Pie Pan
- Mixing Bowls
- Whisk
Instructions
- Preheat your oven to 350°F (175°C). Prepare your pie pan for the crust.
- In a medium bowl, combine the crushed graham cracker crumbs, granulated sugar, and melted unsalted butter. Stir well until the mixture resembles wet sand. Press this mixture firmly and evenly into the bottom and up the sides of your 9-inch pie pan. Bake the crust for 8-10 minutes, or until it turns lightly golden brown. Remove from the oven and set aside on a wire rack to cool completely.1½ cups graham cracker crumbs,
⅓ cup granulated sugar,
6 tablespoons unsalted butter
- While the crust cools, prepare the filling. In another mixing bowl, combine the sweetened condensed milk, sour cream, freshly squeezed key lime juice, and grated key lime zest. Whisk these ingredients together thoroughly until they are smooth and well combined. The mixture will thicken slightly as you whisk. Pour the luscious filling into the cooled graham cracker crust.28 ounces sweetened condensed milk,
½ cup sour cream,
¾ cup key lime juice,
½ tablespoon grated lime zest
- Bake the pie for another 8-10 minutes. The filling should be just set, meaning the edges are firm but the center still has a slight wobble when gently shaken. Be careful not to overbake, as this can affect the creamy texture. Once baked, cool the pie on a wire rack for 30 minutes at room temperature. After this initial cooling, transfer the pie to the refrigerator and chill for at least 3 hours, or preferably overnight, until it is completely cold and firm.

- Once thoroughly chilled, slice the Key Lime Pie into wedges. Serve each slice with a generous dollop of freshly whipped cream and a delicate lime slice for an extra burst of color and flavor, if desired. Enjoy this refreshing summer delight!Whipped cream,
Lime slices
Notes & Expert Tips
Tips for Success:
- Homemade Condensed Milk: If you don’t have sweetened condensed milk on hand, you can craft a quick homemade version by combining maple syrup with whole milk, a touch of butter, and a hint of vanilla extract. Be aware this might slightly alter the pie’s traditional flavor.
- Enhance Flavor and Presentation: Always add a thin lime slice to your pieces of Key Lime Pie as the perfect garnish. Not only does it add visual appeal, but the fresh zest can also enhance the overall citrus flavor of each bite.
- Whipped Cream Perfection: Consider adding a generous dollop of freshly made whipped cream to each slice. The creamy, slightly sweet topping beautifully complements the tartness of the pie filling, creating a delightful contrast.
- Zest for Extra Zest: Don’t skip the lime zest in the filling! The zest contains essential oils that significantly amplify the vibrant lime flavor without adding extra acidity.
- Don’t Overbake: The key to a creamy Key Lime Pie is to bake it just until the edges are set and the center barely wobbles. Overbaking can lead to a dense, rubbery texture.
- Nutritional information provided does not include any optional ingredients or garnishes.
Storage & Make-Ahead: Store your homemade Key Lime Pie in an airtight container in the refrigerator for up to 2 days. For longer storage, it can be frozen for up to 2 months. To enjoy after freezing, let it thaw overnight in the refrigerator. Alternatively, pre-cut slices can be enjoyed directly from the freezer as an ice cream-like dessert, though I recommend letting them sit at room temperature for 5-10 minutes to soften slightly for the best texture.
Calories from Fat 621
How to Make Key Lime Pie: Step-by-Step Guide
Creating this delightful Key Lime Pie is a straightforward process when you follow these easy steps:
1. Bake the Perfect Graham Cracker Crust
Begin by preheating your oven to 350°F (175°C). In a medium-sized mixing bowl, combine 1½ cups of finely crushed graham cracker crumbs (this usually equates to about 12 whole cracker sheets), ⅓ cup of granulated sugar, and 6 tablespoons of melted unsalted butter. Stir these ingredients together until the mixture is thoroughly combined and has the consistency of wet sand. Firmly press this mixture evenly into the bottom and up the sides of a 9-inch pie pan. Bake for 8-10 minutes, or until the crust achieves a beautiful golden-brown hue. Once baked, remove it from the oven and allow it to cool completely on a wire rack. A cool crust is crucial for a non-soggy pie.

2. Prepare the Zesty Key Lime Filling
While your crust is cooling, turn your attention to the star of the show – the Key Lime filling. In a separate mixing bowl, combine 28 ounces (equivalent to two standard cans) of sweetened condensed milk, ½ cup of sour cream, ¾ cup of freshly squeezed Key lime juice (typically obtained from about 8 Key limes), and ½ tablespoon of finely grated Key lime zest (from about 1 Key lime). Whisk all these ingredients vigorously until they are thoroughly combined and the mixture becomes smooth and slightly thickened. The acidity of the lime juice will react with the condensed milk, helping it to set. Once mixed, carefully pour this luscious filling into your cooled graham cracker crust.

3. Bake and Chill to Perfection
Return the pie to the preheated oven and bake for an additional 8-10 minutes. The goal here is for the filling to be “just set” – the edges should appear firm, but the center should still have a slight, gentle wobble when the pan is carefully shaken. It’s crucial not to overbake, as this can result in a less creamy, denser texture. Once baked, remove the pie and let it cool on a wire rack at room temperature for about 30 minutes. After this initial cooling, transfer the pie to the refrigerator. Allow it to chill for a minimum of 3 hours, but ideally overnight, to ensure it’s perfectly cold, firm, and sliceable.

4. Garnish and Serve Your Masterpiece
Once your Key Lime Pie is thoroughly chilled and firm, it’s time to enjoy! Carefully cut the pie into individual wedges. For an elegant presentation and an extra burst of flavor, serve each slice with a dollop of fresh whipped cream and a delicate slice or wedge of lime. The creamy sweetness of the whipped cream provides a lovely contrast to the pie’s tangy brightness, making every bite a true summer delight.

Optimal Storage and Freezing for Your Key Lime Pie
Proper storage is essential to maintain the freshness and delightful texture of your homemade Key Lime Pie. Store any leftover pie in an airtight container in the refrigerator for up to 2 days. This prevents it from absorbing other odors and keeps the crust from becoming soggy.
For longer preservation, Key Lime Pie freezes exceptionally well. You can freeze the entire pie or individual slices in an airtight, freezer-safe container for up to 2 months. When you’re ready to enjoy it again, simply transfer the frozen pie or slices to the refrigerator and allow them to thaw overnight. This slow thawing process helps to maintain the pie’s creamy consistency.
An innovative way to enjoy frozen slices is straight from the freezer! They offer a delightful, ice cream-like dessert experience. However, for a slightly softer, more traditional pie texture, I recommend letting the frozen slices sit at room temperature for about 5-10 minutes before indulging. This brief thaw softens the filling just enough without compromising its chilled refreshing quality.
Frequently Asked Questions About Key Lime Pie
Why is my Key Lime Pie runny?
A runny Key Lime Pie usually stems from two main issues: insufficient chilling time or incorrect ingredient ratios. Ensure your pie chills for at least 3 hours, or even better, overnight. The lime juice reacts with the sweetened condensed milk to thicken the pie, so precise measurements are key. Using full-fat sour cream also helps with the setting. Over-mixing the filling can sometimes incorporate too much air, leading to a less stable set.
Can I use bottled Key lime juice?
Yes, you can absolutely use bottled Key lime juice, especially if fresh Key limes are hard to find. Many brands offer good quality bottled juice that will still provide that distinctive Key lime flavor. Just make sure it’s 100% Key lime juice and not a concentrate or a blend with other lime varieties for the most authentic taste.
How do I prevent a soggy crust?
To avoid a soggy crust, ensure you bake your graham cracker crust until it’s golden and firm before adding the filling. This pre-baking (blind baking) helps to dry it out and creates a barrier. Also, make sure the crust is completely cooled before pouring in the filling. The butter in the crust solidifies when chilled, which helps to create a moisture-resistant layer. Storing the pie in an airtight container also limits moisture exposure.
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