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3 key lime pie bars on a marble slab topped with lime slices and lime zest

Key Lime Pie Squares


  • Author: Katelyn
  • Prep Time: 30 minutes
  • Cook Time: 25 minutes
  • Total Time: 55 minutes
  • Yield: 16 bars 1x

Description

These key lime pie bars are extra tart and make for a bright and refreshing dessert that is perfect for warmer days! Adding mascarpone to the mix makes this recipe unique and creates a super creamy texture that I know you are going to love!


Ingredients

Scale

For the Crust

  • 15 graham crackers 
  • 1/2 cup unsalted butter (1 stick), melted
  • 2 teaspoons granulated sugar
  • 1/4 teaspoon salt

For the Filling

  • 114 ounce can sweetened condensed milk
  • 18 ounce container mascarpone
  • 1/2 cup whole milk plain Greek yogurt
  • 1 cup lime juice 
  • 2 tablespoons lime zest 

Optional topping

  • whipped cream 
  • slices of lime

Instructions

Prepare the Crust 

  1. Preheat oven to 350 degrees F
  2. Grease a 9 x 9 inch baking dish with non-stick cooking spray. 
  3. Place the graham crackers into a food processer and process at high speed into crumbs. (If you don’t have a food processer you can pound the graham crackers into crumbs in a large ziplock bag then transfer to a mixing bowl for the steps below)
    graham crackers in a food processorgraham cracker crumbs in a food processor
  4. Add the sugar and salt to the food processer and pulse until evenly combined.
  5. Add the melted butter and pulse again until the crumbs are fully coated. (If you aren’t using a food processer, mix well with a fork then combine with your hands until all the crumbs are thoroughly coated in butter. 
    graham cracker crust mixture in a stainless steel bowl
  6. Transfer the crumb mixture to your 9 x 9 inch baking dish and use the bottom of a drinking glass or measuring cup to pack the mixture tightly into the bottom of the dish.
    graham cracker crust in a 9 x 9 inch baking dish 
  7. Pre-bake the graham cracker crust for 10 minutes (prior to adding the filling), then remove from oven to cool.

Prepare the Filling

  1. Whisk the sweetened condensed milk, mascarpone, and greek yogurt in a large mixing bowl for at least 2 minutes until smooth and creamy (you can also do this step in a stand mixer fitted with the whisk attachment).
    sweetened condensed milk, mascarpone and Greek yogurt in a stainless steel bowl
  2. Stir in the lime juice and lime zest and whisk again for another two minutes. 
    key lime pie filling with lime zest in a large stainless steel bowlkey lime pie filling with lime zest and lime juicein a large stainless steel bowlkey lime pie filling in a large stainless steel bowl
  3. When the crust finishes pre-baking, pour the filling on top of the crust and use a rubber spatula to smooth the top. 
    key lime pie bars in a 9 x 9 inch square baking dish
  4. Bake the whole thing for another 15 minutes at 350 degrees. 
  5. Remove the dish from the oven and transfer it to a wire cooling rack. Once the dessert has cooled completely (about an hour), transfer to the refrigerator to chill for another 2 hours minimum, but the longer the better!
  6. Cut into squares and serve chilled! Optional: Top with whipped cream and a slice of lime. 

Notes

  • You can easily convert this recipe to a standard key lime pie. Just swap out the baking dish and keep everything else the same!
  • Category: Desserts
  • Method: Baked
  • Cuisine: American

Keywords: dessert, key lime pie, bars

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