Key Lime Pie
Key Lime Pie is one of those classic desserts that never goes out of style, and for good reason - its combination of a buttery, crumbly crust and a silky, tangy filling is absolute perfection. I still remember the first time I made a Key Lime Pie from scratch, and how amazed I was by the way the flavors all came together. As a home cook, I've always been drawn to recipes that are both elegant and accessible, and this pie is the epitome of that.
One of the things that sets this recipe apart is the use of real key lime juice, which gives the filling a depth of flavor that's just not replicable with bottled juice. Of course, if you can't find fresh key limes, you can substitute in some Nellie & Joe's Famous Key West Lime Juice - it's a great alternative that's widely available.
As we head into warmer weather, I find myself craving lighter, brighter desserts that are perfect for outdoor gatherings and potlucks. This Key Lime Pie is a staple in our house during the spring and summer months, and I know it will become one in yours too. So let's get started, and make a Key Lime Pie that's sure to impress your friends and family!
In this recipe, we'll be using a combination of all-purpose flour, granulated sugar, and unsalted butter to make the crust, and a mixture of condensed milk, large egg yolks, and key lime juice to make the filling. We'll also be using a water bath to bake the pie, which helps to prevent the crust from burning and ensures that the filling is cooked to a silky, creamy perfection.
Before we begin, make sure you have all of the necessary ingredients and equipment on hand. You'll need a 9-inch pie dish, a mixing bowl, a whisk, and a pastry blender or food processor to make the crust. You'll also need a medium bowl and a hand mixer or whisk to make the filling.
Why You’ll Love This Recipe
- This recipe is easy to make and requires minimal special equipment
- The combination of a crumbly crust and a silky, tangy filling is absolute perfection
- Key Lime Pie is a classic dessert that's perfect for warm weather gatherings and potlucks
- The recipe can be made ahead of time and refrigerated or frozen for later use
- The filling is made with real key lime juice, which gives it a depth of flavor that's just not replicable with bottled juice
- The water bath helps to prevent the crust from burning and ensures that the filling is cooked to a silky, creamy perfection
- The recipe is highly customizable, so you can experiment with different variations and substitutions to make it your own
Why This Recipe Works
The key to a great Key Lime Pie is in the balance of flavors and textures. The crust needs to be crumbly and buttery, while the filling needs to be silky and tangy. To achieve this, we'll be using a combination of all-purpose flour, granulated sugar, and unsalted butter to make the crust, and a mixture of condensed milk, large egg yolks, and key lime juice to make the filling.
The water bath is also an important component of this recipe, as it helps to prevent the crust from burning and ensures that the filling is cooked to a silky, creamy perfection. By baking the pie in a water bath, we're able to cook the filling slowly and gently, which helps to prevent it from curdling or scrambling.
In addition to the water bath, we'll also be using a technique called 'tempering' to help the filling set. Tempering involves slowly pouring the warm filling into the cold crust, which helps to prevent the filling from cracking or separating. By tempering the filling, we're able to create a smooth, even texture that's just perfect for a Key Lime Pie.
Finally, the key to a great Key Lime Pie is in the quality of the ingredients. Fresh key limes, real condensed milk, and large egg yolks are all essential to creating a pie that's both authentic and delicious. So be sure to use the best ingredients you can find, and don't be afraid to experiment with different variations and substitutions to make the recipe your own.
Ingredients You’ll Need
To make this Key Lime Pie, you'll need a few basic ingredients, including all-purpose flour, granulated sugar, and unsalted butter for the crust, and a mixture of condensed milk, large egg yolks, and key lime juice for the filling. You'll also need a few specialty ingredients, such as key limes and a pastry blender or food processor to make the crust.
When shopping for ingredients, be sure to choose high-quality items that are fresh and flavorful. Fresh key limes are essential to creating a pie that's both authentic and delicious, so be sure to choose limes that are heavy for their size and have a bright, vibrant color. You'll also want to use real condensed milk, rather than a substitute, to give the filling a rich, creamy texture.
- 2 cups (250g) all-purpose flourAll-purpose flour is a staple ingredient in most baked goods, and is essential for creating a crumbly, buttery crust. Be sure to choose a high-quality flour that is fresh and flavorful.
- 1 cup (200g) granulated sugarGranulated sugar is used to balance the acidity of the key lime juice and add sweetness to the filling. Be sure to choose a high-quality sugar that is fresh and flavorful.
- 1/2 cup (115g) unsalted butter, chilled and cut into small piecesUnsalted butter is used to add flavor and texture to the crust, and is essential for creating a crumbly, buttery texture. Be sure to choose a high-quality butter that is fresh and flavorful.
- 1/2 cup (120ml) freshly squeezed key lime juiceFresh key lime juice is essential to creating a pie that's both authentic and delicious. Be sure to choose key limes that are heavy for their size and have a bright, vibrant color.
- 1 can (14 oz/397g) sweetened condensed milkSweetened condensed milk is used to add richness and creaminess to the filling, and is essential for creating a silky, smooth texture. Be sure to choose a high-quality condensed milk that is fresh and flavorful.
- 3 large egg yolksLarge egg yolks are used to add richness and depth to the filling, and are essential for creating a silky, smooth texture. Be sure to choose high-quality eggs that are fresh and flavorful.
- 1 tsp (5g) grated lime zestGrated lime zest is used to add flavor and texture to the filling, and is essential for creating a bright, citrusy flavor. Be sure to choose high-quality limes that are fresh and flavorful.
- 1/4 tsp fine saltFine salt is used to balance the acidity of the key lime juice and add depth to the filling. Be sure to choose a high-quality salt that is fresh and flavorful.
- 1 cup (120g) heavy cream, whipped (optional)Heavy cream is used to add richness and creaminess to the filling, and is essential for creating a silky, smooth texture. Be sure to choose high-quality cream that is fresh and flavorful.
- 1/4 cup (30g) chopped fresh mint leaves (optional)Chopped fresh mint leaves are used to add flavor and texture to the filling, and are essential for creating a bright, refreshing flavor. Be sure to choose high-quality mint that is fresh and flavorful.
Equipment You’ll Need
How to Make Key Lime Pie
- 1Preheat the oven to 350°F (180°C).
- 2In a medium bowl, whisk together the flour, sugar, and salt. Add the cold butter and use a pastry blender or food processor to work it into the flour mixture until it resembles coarse crumbs.
- 3Press the crust mixture into the bottom and up the sides of a 9-inch (23cm) pie dish. Bake the crust for 18-20 minutes, or until it is lightly golden brown and set.
- 4While the crust is baking, prepare the filling. In a large bowl, whisk together the sweetened condensed milk, key lime juice, and grated lime zest until well combined.
- 5In a separate bowl, whisk together the egg yolks. Temper the egg yolks by slowly pouring the warm filling mixture into the egg yolks, whisking constantly.
- 6Pour the filling mixture into the baked pie crust and smooth the top. Bake the pie for 15-18 minutes, or until the filling is set and the edges are lightly golden brown.
- 7Remove the pie from the oven and let it cool to room temperature. Cover the pie with plastic wrap and refrigerate for at least 2 hours, or until chilled.
- 8Just before serving, whip the heavy cream until stiff peaks form. Top the pie with the whipped cream and garnish with chopped fresh mint leaves, if desired.
- 9To serve, slice the pie into wedges and serve chilled. You can also freeze the pie for up to 2 months, or refrigerate for up to 3 days.
- 10To make ahead, prepare the crust and filling separately and store them in the refrigerator for up to 24 hours. Assemble the pie just before baking.
- 11To freeze, wrap the pie tightly in plastic wrap and aluminum foil and freeze for up to 2 months. Thaw the pie overnight in the refrigerator before serving.
Expert Tips
- Use high-quality ingredients, such as fresh key limes and real condensed milk, to ensure the best flavor and texture.
- Don't overwork the crust mixture, or it will become tough and dense.
- Temper the egg yolks carefully to prevent them from scrambling.
- Don't overbake the pie, or the filling will be too firm and the crust will be too dark.
- Let the pie cool to room temperature before refrigerating it, to prevent the filling from cracking.
- Whip the heavy cream just before serving, to ensure it stays light and fluffy.
- Garnish with chopped fresh mint leaves, if desired, for a bright and refreshing flavor.
- Experiment with different variations, such as adding a layer of caramel or nuts to the crust, to make the recipe your own.
Common Mistakes to Avoid
- Overworking the crust mixture, which can make it tough and dense.
- Not tempering the egg yolks, which can cause them to scramble.
- Overbaking the pie, which can make the filling too firm and the crust too dark.
- Not letting the pie cool to room temperature, which can cause the filling to crack.
- Not whipping the heavy cream just before serving, which can make it too stiff and separate.
- Not using high-quality ingredients, which can affect the flavor and texture of the pie.
Variations and Substitutions
- Add a layer of caramel or nuts to the crust for added flavor and texture.
- Use a different type of citrus, such as lemon or orange, for a unique flavor.
- Add a splash of liqueur, such as Grand Marnier or Cointreau, to the filling for added depth.
- Use a different type of milk, such as almond or coconut milk, for a non-dairy version.
- Add a sprinkle of sea salt or chopped nuts to the whipped cream for added texture and flavor.
- Make individual mini pies for a fun and easy dessert.
- Use a pre-made crust or filling to simplify the recipe and save time.
What to Serve With Key Lime Pie
This Key Lime Pie is perfect for serving at warm weather gatherings and potlucks. You can serve it on its own, or with a side of whipped cream or fresh fruit. It's also delicious with a cup of coffee or tea, or as a dessert after a meal.
Some other ideas for serving this pie include: topping it with a layer of caramel or nuts, serving it with a side of chocolate sauce or caramel sauce, or using it as a base for a sundae or ice cream sandwich. You could also serve it with a side of fresh fruit, such as strawberries or blueberries, or with a sprinkle of powdered sugar on top.
Make-Ahead, Storage, Freezing and Reheating
This Key Lime Pie can be stored in the refrigerator for up to 3 days, or frozen for up to 2 months. To store, cover the pie with plastic wrap and refrigerate or freeze.
To freeze, wrap the pie tightly in plastic wrap and aluminum foil and freeze for up to 2 months. Thaw the pie overnight in the refrigerator before serving.
To make ahead, prepare the crust and filling separately and store them in the refrigerator for up to 24 hours. Assemble the pie just before baking.
When storing the pie, be sure to keep it away from strong-smelling foods, as the filling can absorb odors easily. You can also store the pie in an airtight container, such as a glass or plastic container with a tight-fitting lid, to keep it fresh for longer.
Frequently Asked Questions
What is the best way to store a Key Lime Pie?
The best way to store a Key Lime Pie is to cover it with plastic wrap and refrigerate it for up to 3 days, or freeze it for up to 2 months.
Can I make a Key Lime Pie ahead of time?
Yes, you can make a Key Lime Pie ahead of time. Prepare the crust and filling separately and store them in the refrigerator for up to 24 hours. Assemble the pie just before baking.
What is the best way to serve a Key Lime Pie?
The best way to serve a Key Lime Pie is to slice it into wedges and serve it chilled, with a side of whipped cream or fresh fruit if desired.
Can I freeze a Key Lime Pie?
Yes, you can freeze a Key Lime Pie. Wrap the pie tightly in plastic wrap and aluminum foil and freeze for up to 2 months. Thaw the pie overnight in the refrigerator before serving.
What is the best way to thaw a frozen Key Lime Pie?
The best way to thaw a frozen Key Lime Pie is to thaw it overnight in the refrigerator. Let the pie come to room temperature before serving.
Can I make a Key Lime Pie without a water bath?
While a water bath is recommended for baking a Key Lime Pie, you can make it without one. However, the filling may not be as smooth and creamy, and the crust may be more prone to burning.
What is the best way to prevent the crust from burning?
The best way to prevent the crust from burning is to use a water bath and to not overbake the pie. You can also use a pie shield or foil to cover the crust and prevent it from burning.
Can I use a pre-made crust or filling for a Key Lime Pie?
Yes, you can use a pre-made crust or filling for a Key Lime Pie. However, keep in mind that the flavor and texture may not be as good as a homemade pie.

Ingredients
- 2 cups (250g) all-purpose flour
- 1 cup (200g) granulated sugar
- 1/2 cup (115g) unsalted butter, chilled and cut into small pieces
- 1/2 cup (120ml) freshly squeezed key lime juice
- 1 can (14 oz/397g) sweetened condensed milk
- 3 large egg yolks
- 1 tsp (5g) grated lime zest
- 1/4 tsp fine salt
- 1 cup (120g) heavy cream, whipped (optional)
- 1/4 cup (30g) chopped fresh mint leaves (optional)
Instructions
- Preheat the oven to 350°F (180°C).
- In a medium bowl, whisk together the flour, sugar, and salt. Add the cold butter and use a pastry blender or food processor to work it into the flour mixture until it resembles coarse crumbs.
- Press the crust mixture into the bottom and up the sides of a 9-inch (23cm) pie dish. Bake the crust for 18-20 minutes, or until it is lightly golden brown and set.
- While the crust is baking, prepare the filling. In a large bowl, whisk together the sweetened condensed milk, key lime juice, and grated lime zest until well combined.
- In a separate bowl, whisk together the egg yolks. Temper the egg yolks by slowly pouring the warm filling mixture into the egg yolks, whisking constantly.
- Pour the filling mixture into the baked pie crust and smooth the top. Bake the pie for 15-18 minutes, or until the filling is set and the edges are lightly golden brown.
- Remove the pie from the oven and let it cool to room temperature. Cover the pie with plastic wrap and refrigerate for at least 2 hours, or until chilled.
- Just before serving, whip the heavy cream until stiff peaks form. Top the pie with the whipped cream and garnish with chopped fresh mint leaves, if desired.
- To serve, slice the pie into wedges and serve chilled. You can also freeze the pie for up to 2 months, or refrigerate for up to 3 days.
- To make ahead, prepare the crust and filling separately and store them in the refrigerator for up to 24 hours. Assemble the pie just before baking.
- To freeze, wrap the pie tightly in plastic wrap and aluminum foil and freeze for up to 2 months. Thaw the pie overnight in the refrigerator before serving.