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Best Key Lime Tart with Whipped Cream
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5 from 2 votes

Easy Key Lime Pie

Key lime pie is a favorite at my house! Made with a homemade graham pie crust and a super easy custard filling. You will love it!
Prep Time20 mins
Cook Time28 mins
Chilling6 hrs
Total Time6 hrs 48 mins
Course: Dessert
Cuisine: American
Keyword: key lime pie
Servings: 1 9 inch pie
Author: Tania


Graham pie crust

  • 10 graham crackers (2 ½ x 5 inches each)
  • 2 tablespoons granulated sugar
  • 5 tablespoons unsalted melted butter

Pie filling

  • 21 oz sweet condensed milk
  • 4 large egg yolks
  • 3/4 cups key lime juice
  • 1 teaspoon lime zest
  • 1/4 cup sour cream

Decoration (whipped cream + garnish)

  • 1 cup cold heavy cream
  • 1/4 cup granulated sugar
  • 1/4 teaspoon vanilla extract
  • Thin lime slices


  • Preheat oven to 350 degrees F.
  • Make the crust: in a food processor, pulse the graham crackers until fine crumbs form. Add the sugar and melted butter, and process until well combined. Transfer mixture to a shallow 9-inch tart pan with a removable bottom. Press down bottom and sides using a measuring cup. Place prepared crust on a sheet pan to prevent any crumbs from falling in the oven. Bake for about 10 minutes, until the crust is set, slightly golden brown and fragrant. Let cool slightly.
  • Meanwhile, whisk sweet condensed sugar with egg yolks, sour cream, key lime juice, and lime zest until a smooth mixture forms.
  • Pour the filling into crust and smooth out the surface. Place pie on a sheet pan, if you prefer. Bake for 16-18 minutes until filling is set on the edges. The center should be slightly loose. Cool completely at room temperature, and then chill for about 6 hours or overnight in the refrigerator.
  • Beat the heavy cream on high speed using a stand mixer or electric mixer, using whisk attachment, until soft peak forms. Incorporate sugar, vanilla, and lime zest, and continue to beat until stiff peaks form.
  • Decorate the pie using your favorite decorative pipe. Garnish with lime wedges. Enjoy!