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key lime pie bars sitting in a pile on a wooden stand.
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5 from 7 votes

Irresistible Key Lime Pie Bars

These Irresistible Key Lime Pie Bars are just that—irresistible! Made with the perfect graham cracker crust, a creamy, zesty filling, and a dusting of powdered sugar, they’re the perfect cool and refreshing dessert for summer.
Course Dessert
Cuisine American
Keyword key lime bars, key lime pie bars
Prep Time 5 minutes
Cook Time 32 minutes
Total Time 37 minutes
Servings 16 servings
Calories 187kcal
Author Trish - Mom On Timeout

Ingredients

Graham Cracker Crust

  • 1 1/2 cups graham cracker crumbs
  • 6 tbsp Challenge Butter melted
  • 1/3 cup granulated sugar

Key Lime Filling

  • 14 oz sweetened condensed milk 1 can
  • 5 egg yolks
  • 1/2 cup key lime juice
  • 2 tbsp key lime zest

Topping

  • powdered sugar optional
  • 2 tbsp key lime and/or lemon zest optional

Instructions

Graham Cracker Crust

  • Preheat oven to 375F.
  • Spray an 8-inch or 9-inch square pan with cooking spray and line with parchment paper.
  • Combine graham cracker crumbs, butter, and sugar in a small bowl and stir until combined.
  • Press the graham cracker crumb mixture into the bottom of the prepared pan and press down firmly. Use the bottom of a measuring cup to really pack it in.
  • Bake the graham cracker crust for 7 minutes. Remove from the oven and let cool.

Key Lime Filling

  • Preheat the oven to 350F.
  • Whisk the sweetened condensed milk, egg yolks, lime juice and zest together in a medium bowl.
  • Pour over cooled crust and bake for 25 minutes. Let the bars chill before serving.
  • Dust with powdered sugar and sprinkle with additional zest if desired. Cut into bars.
  • Store in an airtight container in the refrigerator.

Notes

Storage Information
Refrigeration: Wrap the bars tightly with plastic wrap, or store them in an airtight container, in the refrigerator for up to seven days. 
Freezing: The bars can be frozen for up to two months in an airtight, freezer-safe ziplock bag. Thaw overnight in the refrigerator before serving.

Nutrition

Calories: 187kcal | Carbohydrates: 25g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Cholesterol: 81mg | Sodium: 124mg | Potassium: 121mg | Fiber: 1g | Sugar: 20g | Vitamin A: 285IU | Vitamin C: 2.9mg | Calcium: 86mg | Iron: 0.5mg