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close up shot of a key lime pie bar topped with whipped cream and zest.
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4.77 from 13 votes

Key Lime Pie Bars

Key Lime Bars have a zingy lime filling and a buttery graham cracker crust. They taste like key lime pie but are made easy as a dessert bar recipe. It’s the perfect summer dessert!
Prep Time20 mins
Cook Time25 mins
Total Time45 mins
Course: Dessert
Cuisine: American
Keyword: key lime bars, key lime pie bars, lime dessert bars, lime squares



  • 3 1/2 cups graham cracker crumbs about 24 full sheets, I use my food processor
  • 2/3 cup granulated sugar
  • 2 tablespoons brown sugar
  • 1 cup butter melted


  • 6 egg yolks
  • 28 oz sweetened condensed milk
  • 2 Tablespoons lime zest 4-6 limes
  • 1 cup key lime juice


  • Position the rack in the center of your oven and preheat to 350°F. Line a 9x13" metal pan with parchment paper, set aside.
  • Mix together graham cracker crumbs, sugar, and brown sugar. Add the butter and stir until all crumbs are moistened. Press into the bottom of the prepared baking pan. Bake for 10 minutes, then remove from oven but leave the oven on.
  • In the bowl of an electric mixer with the whisk attachment, whisk egg yolks for 2 minutes. Add the condensed milk and whisk for another 2 minutes. Scrape down the sides, then add the lime zest. With the mixer on low, slowly drizzle in the lime juice, then let the mixer run on medium for 2 minutes once added. Pour into the crust and bake for 15 minutes.
  • Let cool to room temperature before moving to the fridge and chilling for at least 2 hours, or overnight for best results. Slice and serve chilled.