Can I use regular limes instead of key limes?

Yes, regular limes can be used if key limes are unavailable. Persian limes are slightly more acidic and less aromatic, so start with a smaller amount of juice and adjust to taste. Fresh lime juice is always recommended for the best flavor in Key Lime Pie Bars.

Why are my Key Lime Pie Bars not setting properly?

Soft or runny bars usually happen when the dessert hasn’t chilled long enough or the filling was underbaked. The center should still jiggle slightly when removed from the oven, but the bars need at least 4 hours in the refrigerator to fully set.

Can I make Key Lime Pie Bars ahead of time?

Absolutely. Key Lime Pie Bars are excellent make-ahead desserts because the texture improves after chilling overnight. You can prepare them up to 2 days in advance and add the whipped cream topping before serving.

How should I store leftover Key Lime Pie Bars?

Store leftover Key Lime Pie Bars in an airtight container in the refrigerator for up to 4 days. For longer storage, freeze individual slices tightly wrapped for up to 2 months and thaw overnight in the fridge before serving.

Key Lime Pie Bars – Easy Creamy Recipe

Name: Key Lime Pie Bars
Prep time: 15 min
Cook time: 28 min
Total time: 4 h 43 min
Cuisine: American
Ingredients: 230g graham crackers (about 16 full sheets); 113g unsalted butter, melted (1/2 cup); 2 cans sweetened condensed milk (28 oz total); 180g fresh key lime juice (3/4 cup); 1 tbsp key lime zest; 2 tsp vanilla extract; 160g sour cream or Greek yogurt (2/3 cup); 2 egg yolks; 360g heavy cream, chilled (1 1/2 cups); 2 tbsp granulated sugar

Description

These Key Lime Pie Bars are creamy, tangy, and refreshingly sweet with a buttery graham cracker crust and fluffy whipped cream topping. Perfect for summer gatherings or easy make-ahead desserts, these bars deliver the classic flavor of key lime pie in an easy-to-slice dessert bar form.

Ingredients

Scale

230g graham crackers (about 16 full sheets)
113g unsalted butter, melted (1/2 cup)
2 cans sweetened condensed milk (28 oz total)
180g fresh key lime juice (3/4 cup)
1 tbsp key lime zest
2 tsp vanilla extract
160g sour cream or Greek yogurt (2/3 cup)
2 egg yolks
360g heavy cream, chilled (1 1/2 cups)
2 tbsp granulated sugar

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Instructions

Preheat the oven to 350°F and line a 9×9-inch baking pan with parchment paper.
Crush the graham crackers into fine crumbs and mix with melted butter until fully combined.
Press the crumb mixture firmly into the bottom of the prepared pan to form the crust.
Bake the crust for 8 to 10 minutes until lightly golden, then reduce oven temperature to 325°F.
In a large bowl, whisk together sweetened condensed milk, key lime juice, lime zest, vanilla extract, and sour cream until smooth.
Add the egg yolks and whisk gently until fully incorporated.
Pour the filling over the baked crust and smooth the surface evenly.
Bake for 17 to 18 minutes until the edges are set and the center slightly jiggles.
Cool the bars at room temperature, then refrigerate for at least 4 hours or overnight.
Whip the heavy cream with granulated sugar until stiff peaks form.
Spread the whipped cream over the chilled bars.
Lift the bars from the pan using parchment paper, slice into squares, and serve chilled.

Notes

Fresh key lime juice provides the best flavor for authentic Key Lime Pie Bars.
Do not overbake the filling or the bars may become dry and eggy.
Chilling overnight creates the cleanest slices and best texture.
Use a sharp knife and wipe it clean between cuts for neat squares.
Regular limes can be substituted if key limes are unavailable.
Add whipped cream shortly before serving for the freshest presentation.

Prep Time: 15 minutes
Cook Time: 28 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 bar
Calories: 340
Sugar: 24g
Sodium: 180mg
Fat: 20g
Saturated Fat: 12g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 35g
Fiber: 1g
Protein: 5g
Cholesterol: 85mg