close up of a cut Key Lime Bar
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5 from 4 votes

Key Lime Bars

Get a taste of Miami Beach from your kitchen! Using only six ingredients, these Key Lime Bars have a puckery curd, no cream cheese filling, layered on a tender graham cracker crust for that refreshing, summer dessert!
Prep Time10 mins
Cook Time50 mins
Total Time1 hr
Course: Dessert
Cuisine: American
Keyword: key lime bars, key lime pie, lemon bars
Servings: 18
Calories: 350kcal
Author: Kevin Is Cooking



  • 1 cup butter softened
  • 1/3 cup brown sugar
  • 2 cups graham cracker crumbs (2 packets, 16 sheets)
  • 1 cup flour
  • 1/2 tsp kosher salt


  • 3 cups sugar
  • 1 cup flour
  • 6 large eggs
  • 1 cup key lime juice


  • Dust with powdered sugar optional
  • 1 lime zest only


  • Preheat oven to 350°F. Line the bottom and sides of a 13x9 baking pan with parchment paper, leaving an overhang on the sides to lift out. Set aside.
  • In a food processor, Vitamix (my go to way) or bag, add graham crackers and process until crumb form. Set aside.
  • In a mixer, cream the butter and brown sugar for a minute until fluffy. Add the flour, graham cracker crumb and salt. Mix until combined.
  • Press evenly in bottom of pan. Bake for 20 minutes while preparing lime filling.
  • To the mixing bowl add the sugar, flour, eggs and key lime juice and beat until thoroughly combined.
  • Pour lime filling over baked crust. Bake for additional 30 minutes or until center no longer jiggles.
  • Allow to cool completely before slicing. I refrigerate another 30 minutes before slicing (optional). Dust top of bars with powdered sugar and lime zest (optionaand slice into 24 bars.


For 9x9 Square Pan: Same oven temperature. Cut each of the ingredients in half to make 12 bars in a 9×9-inch baking pan. Bake the bars for 20 minutes or until the center no longer jiggles.


Calories: 350kcal | Carbohydrates: 57g | Protein: 4g | Fat: 13g | Saturated Fat: 7g | Cholesterol: 82mg | Sodium: 239mg | Potassium: 80mg | Fiber: 1g | Sugar: 40g | Vitamin A: 401IU | Vitamin C: 5mg | Calcium: 27mg | Iron: 1mg