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5 from 6 votes

Irresistible Key Lime Pie Bars

These Irresistible Key Lime Pie Bars are just that - IRRESISTIBLE! Tart and sweet, this easy dessert is made with the perfect graham cracker crust and fresh key lime juice. Bound to become your new favorite dessert!
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


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


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


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.


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