Key Lime Pie Bars
Ingredients
- 1
8.8 oz. package Biscoff cookies, 250g
- 5 Tbsp. butter
unsalted and melted
- 3 large egg yolks
room temperature
- 2 tsp. key lime zest
- 1
14 oz. can sweetened condensed milk
- 2/3 cup key lime juice
- pinch of salt
- 1 1/2 cups heavy cream
cold
- 1/4 cup powdered sugar
plus more as desired
- 1 tsp. vanilla
- 1 Tbsp. sour cream
Directions
- 1
Preheat the oven to 350°F. Line a 8x8 pan with parchment paper.
- 2
Make the crust: Add the Biscoff cookies to a food processor and process until crushed and relatively smooth, stream in the melted butter and pulse until combined. It will look a little coarse and sandy but will come together perfectly for the crust. (If you don't own a food processor, you can put the Biscoff cookies in an airtight bag and pulverize into crumbs using a heavy-bottomed skillet or a rolling pin).
- 3
Pour into the prepared pan and press into an even layer with a flat bottomed glass or measuring cup.
- 4
Bake the crust for 10 minutes. Remove and set aside while you make the filling.
- 5
Zest the limes, and juice the limes.
- 6
Beat the yolks and zest on high speed with the whisk attachment on an electric mixer for 2-3 minutes. It will slightly thicken and resemble a Hollandaise sauce.
- 7
Add the sweetened condensed milk and beat again on high speed for 1-2 minutes. It will now begin to look thicker and have more volume.
- 8
Turn the mixer off. Add in the lime juice and pinch of salt and stir with a rubber spatula just until combined. Be sure to get any zest that may have stuck to the whisk attachment and stir it back into the filling so it doesn’t go to waste!
- 9
Pour the filling onto the crust and smooth out the top.
- 10
Bake for 10-15 minutes or until the center is mostly set, but with a slight jiggle. A little wobbly in the center is OK!
- 11
Remove from the oven and cool to room temperature. Then, refrigerate for at least 3 hours or overnight.
- 12
Homemade whipped cream note: This makes a lot of whipped cream for a thick layer on top which I love! If you want less, only use 1 cup whipped cream and a little less powdered sugar. Using a hand held mixer or electric mixer with a whisk attachment, beat the heavy cream on medium-high speed until soft peaks begin to form, about 1-2 minutes. Then add in the powdered sugar, vanilla extract and sour cream and beat until medium peaks form or desired consistency is reached. Taste and add more powdered sugar if needed.
- 13
Spread the whipped cream on top of the chilled key lime pie bars in an even layer. Place back in the fridge for another 30 minutes prior to slicing. Garnish with more zest on top, and enjoy!
Key Lime Pie Bars
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About this Recipe
Looking for the quintessential taste of summer in a dessert bar? These Key Lime Pie Bars deliver that iconic tart-sweet key lime flavor beautifully balanced with a unique Biscoff cookie crust and a generous layer of homemade whipped cream, making them a gorgeous dessert for Spring and Summer.
What sets these bars apart is the delightful Biscoff cookie crust, offering a subtly spiced, buttery counterpoint to the vibrant, creamy key lime filling. The filling itself comes together with just a few ingredients—egg yolks, key lime zest, sweetened condensed milk, and key lime juice—ensuring a smooth, tangy custard. It’s all crowned with a thick, velvety homemade whipped cream, featuring a touch of vanilla and sour cream, for the perfect finish that elevates these bars beyond the ordinary.
Prepare for a symphony of textures and flavors. Each bite starts with the crisp, spiced Biscoff crust, giving way to a lusciously smooth, tangy key lime filling that perfectly balances sweetness with bright citrus notes. The experience is then softened by the airy, rich whipped cream, making for an incredibly satisfying dessert that feels both decadent and light. This is a truly gorgeous dessert that captures the essence of warm weather.
Customization & Serving Ideas
While the classic combination is divine, you can explore simple variations. If Biscoff cookies aren't available, a graham cracker crust is a traditional alternative that also pairs wonderfully with key lime. For an extra punch of citrus and a pop of color, consider a tiny sprinkle of fresh key lime zest over the finished whipped cream before serving.
These elegant bars are perfect for any Spring or Summer gathering, from casual backyard barbecues to more formal soirées. Serve them chilled as a refreshing end to any meal, offering a bright, zesty contrast that cleanses the palate.