Key lime pie is a classic dessert that perfectly balances tart and sweet flavors. This pie features a buttery graham cracker crust and a creamy, tangy filling made with key lime juice. It's a refreshing treat that's perfect for any occasion.
When preparing this recipe, you might need to visit the supermarket for a few specific ingredients. Key lime juice is essential for the authentic flavor, and it may not be readily available in all stores. Additionally, graham cracker crumbs are crucial for the crust, so make sure to pick up a box if you don't have any at home.

Ingredients for Key Lime Pie Recipe
Graham cracker crumbs: These are finely crushed crackers used to create the pie crust.
Sugar: Adds sweetness to the crust and balances the tartness of the lime filling.
Butter: Melted butter binds the graham cracker crumbs together to form the crust.
Egg yolks: Provide richness and help thicken the pie filling.
Sweetened condensed milk: Adds sweetness and creaminess to the filling.
Key lime juice: The star ingredient that gives the pie its distinctive tart flavor.
Lime zest: Enhances the lime flavor and adds a bit of texture to the filling.
Technique Tip for Making Key Lime Pie
When making the crust, ensure that the graham cracker crumbs are finely ground to achieve a uniform texture. This will help the butter bind the crumbs together more effectively, resulting in a sturdy and cohesive base for your key lime pie. Additionally, pressing the mixture firmly into the pie dish using the bottom of a measuring cup can help create an even and compact crust.
Suggested Side Dishes
Alternative Ingredients
graham cracker crumbs - Substitute with digestive biscuit crumbs: Digestive biscuits have a similar texture and flavor, making them a good alternative for the crust.
sugar - Substitute with honey: Honey can add a natural sweetness and a slightly different flavor profile to the crust.
butter - Substitute with coconut oil: Coconut oil can provide a similar binding effect and adds a subtle coconut flavor.
egg yolks - Substitute with silken tofu: Silken tofu can mimic the creamy texture of egg yolks and is a good option for a vegan version.
sweetened condensed milk - Substitute with coconut condensed milk: Coconut condensed milk offers a similar sweetness and consistency, making it a great dairy-free alternative.
key lime juice - Substitute with regular lime juice: Regular lime juice can be used if key limes are not available, though the flavor may be slightly less intense.
lime zest - Substitute with lemon zest: Lemon zest can provide a similar citrusy aroma and flavor if lime zest is not available.
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How to Store or Freeze Your Pie
- To keep your key lime pie fresh and delightful, store it in the refrigerator. Cover the pie with plastic wrap or aluminum foil to prevent it from absorbing any unwanted odors from other foods.
- If you plan to enjoy the pie over several days, consider using an airtight container. This will help maintain the crust's crispness and the filling's creamy texture.
- For longer storage, freezing is an excellent option. First, let the pie cool completely to room temperature. Then, place it in the freezer uncovered for about 1-2 hours until it firms up.
- Once the pie is firm, wrap it tightly in plastic wrap, followed by a layer of aluminum foil. This double wrapping will protect it from freezer burn and preserve its flavor.
- When you're ready to enjoy your frozen dessert, transfer it to the refrigerator and let it thaw overnight. This gradual thawing process will ensure the key lime pie retains its creamy consistency.
- If you're in a hurry, you can also thaw individual slices at room temperature for about 30 minutes. However, avoid using the microwave, as it can alter the texture of the filling.
- For an extra touch of freshness, garnish your thawed pie with a dollop of whipped cream and a sprinkle of lime zest just before serving. This will enhance the citrus notes and make your dessert look as good as it tastes.
How to Reheat Leftovers
Preheat your oven to 300°F (150°C). Place the key lime pie on a baking sheet and cover it loosely with aluminum foil to prevent the crust from over-browning. Heat for about 10-15 minutes or until warmed through. This method ensures the pie retains its delightful texture without becoming soggy.
If you're in a hurry, use a microwave. Place a slice of key lime pie on a microwave-safe plate. Heat on medium power for 20-30 seconds. Be cautious not to overheat, as this can cause the filling to become too soft and the crust to lose its crunch.
For a more even reheating, consider using a toaster oven. Set it to 300°F (150°C) and place the pie on a baking tray. Heat for about 10 minutes, checking periodically to ensure it doesn't overheat. This method is great for maintaining the pie's original texture and flavor.
If you prefer a cold key lime pie, simply let it sit at room temperature for about 10-15 minutes before serving. This allows the filling to soften slightly, making it easier to cut and enjoy without compromising its refreshing taste.
Essential Tools for This Recipe
Oven: Used to bake the crust and the pie filling at a consistent temperature.
Mixing bowl: Essential for combining the graham cracker crumbs, sugar, and melted butter, as well as for whisking the filling ingredients.
Pie dish: The vessel in which the crust and filling are baked.
Whisk: Used to blend the egg yolks, sweetened condensed milk, key lime juice, and lime zest until smooth.
Measuring cups: Necessary for accurately measuring the graham cracker crumbs, sugar, and key lime juice.
Measuring spoons: Used to measure the lime zest.
Spatula: Helpful for pressing the graham cracker mixture into the pie dish and for scraping the filling into the crust.
Zester: Used to zest the lime, providing the necessary lime zest for the filling.
Cooling rack: Allows the pie crust to cool evenly after baking.
Refrigerator: Essential for chilling the pie for at least 2 hours before serving.
How to Save Time on This Recipe
Prepare ingredients in advance: Measure out graham cracker crumbs, sugar, and butter ahead of time to streamline the process.
Use a food processor: Quickly crush graham crackers using a food processor instead of manually.
Pre-bake the crust: While the crust is baking, prepare the filling to save time.
Juice in bulk: Squeeze all the key limes at once and store the juice in the fridge for easy access.
Chill overnight: Make the pie the night before and let it chill overnight to save time on the day of serving.

Key Lime Pie Recipe
Ingredients
Crust
- 1 ½ cups Graham cracker crumbs
- ¼ cup Sugar
- ½ cup Butter, melted
Filling
- 4 large Egg yolks
- 1 can Sweetened condensed milk 14 oz
- ½ cup Key lime juice freshly squeezed
- 1 tablespoon Lime zest
Instructions
- Preheat the oven to 350°F (175°C).
- In a mixing bowl, combine graham cracker crumbs, sugar, and melted butter. Press the mixture into a pie dish to form the crust.
- Bake the crust for 10 minutes, then let it cool.
- In another bowl, whisk together egg yolks, sweetened condensed milk, key lime juice, and lime zest until smooth.
- Pour the filling into the cooled crust and bake for 15 minutes.
- Let the pie cool to room temperature, then refrigerate for at least 2 hours before serving.
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