Mix graham cracker crumbs and sugar in a bowl. Add melted butter and stir until evenly coated. Press mixture into a 9-inch pie dish.
1 ½ cups graham cracker crumbs, ⅓ cup granulated sugar, 7 tablespoons unsalted butter
Bake for 8-10 minutes. Let cool.
In a large bowl or a stand mixer with a whisk attachment, whisk egg yolks until pale and thickened. Gradually add sweetened condensed milk, whisking until smooth. Stir in key lime juice and lime zest (if using) until well combined.
4 large egg yolks, 28 ounces sweetened condensed milk, 1 cup key lime juice, 2 tablespoons lime zest
If you turned off the oven, preheat it again to 350°F (175°C).
Pour filling into cooled crust. Bake for 15-20 minutes until filling is set but slightly jiggly in the center. Cool to room temperature for about an hour, then refrigerate for at least 2-4 hours (6-8 hours is best).
In a large bowl, beat heavy whipping cream, powdered sugar, and vanilla extract until stiff peaks form. Spread or pipe over chilled pie.
1 cup heavy whipping cream, 3 tablespoons powdered sugar, 1 teaspoon vanilla extract
Serve garnished with extra lime zest or lime slices if desired.
Notes
The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 1 slice of pie. Actual calories will vary.
I use a full cup of key lime juice, which gives this pie a wonderfully tangy and slightly tart flavor. If you prefer a less tangy and sweeter taste, you can use as little as ¾ cup of key lime juice.
Nutrition Facts
Key Lime Pie
Serving Size
1 slice
Amount per Serving
Calories
644
% Daily Value*
Fat
32
g
49
%
Saturated Fat
19
g
95
%
Trans Fat
0.3
g
Polyunsaturated Fat
2
g
Monounsaturated Fat
9
g
Cholesterol
187
mg
62
%
Sodium
244
mg
10
%
Potassium
474
mg
14
%
Carbohydrates
81
g
27
%
Fiber
1
g
4
%
Sugar
70
g
78
%
Protein
11
g
22
%
Vitamin A
1.11
IU
0
%
Vitamin C
12
mg
15
%
Calcium
333
mg
33
%
Iron
1
mg
6
%
* Percent Daily Values are based on a 2000 calorie diet.