When in doubt, add chocolate – it’s the flavor you didn’t know your limes were missing. With a crunchy cookie base, these puckery lime bars are a break from the usual, packing a little more oomph. If key limes aren’t available, substitute with regular lime juice, but also add the zest from one lime to supplement.
Chocolate Crusted Key Lime Bars

Prep Time 20 minutes mins
Cook Time 15 minutes mins
Chill Time 2 hours hrs
When in doubt, add chocolate – it's the flavor you didn't know your limes were missing. With a crunchy cookie base, these puckery lime bars are a break from the usual, packing a little more oomph. If key limes aren't available, substitute with regular lime juice, but also add the zest from one lime to supplement.
5 from 1 vote
Course Dessert
Servings 16 Bars
Ingredients
For the crust:
- 200 grams ground chocolate cookies, about 3 cups
- 8 tablespoons (1 stick) unsalted butter, melted
- 2 tablespoons light or dark brown sugar
For the filling:
- 14- ounce can sweetened condensed milk
- ½ cup fresh key lime juice, or regular lime juice plus zest from 1 lime
- 4 egg yolks
Instructions
- Begin by making the crust. Preheat your oven to 325. Line a 9 x 9” baking pan with two sheets of parchment paper so that each piece fits in the bottom of the pan and comes up two sides.
- Combine the chocolate cookies, melted butter, and brown sugar in a bowl and mix well. Press into the bottom of the prepared pan and bake for 7-10 minutes. Remove and set aside while you prepare the filling.
- Put the egg yolks in a bowl and whisk. Add the condensed milk and lime juice and zest and stir.
- Pour the filling into the crust and return it to the oven and bake another 12-15 minutes until set but still jiggly. Let cool completely, then refrigerate for 2-4 hours, or overnight, before cutting into squares. Dust with powdered sugar if desired.
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