CITRUS DESSERT

Key Lime Pie Bars

A buttery graham crust and a smooth, tangy lime filling finished with whipped cream.

Key Lime Pie Bars have a buttery graham crust and a smooth, tangy lime filling finished with whipped cream. Careful mixing and complete cooling protect the crumb, filling, or crust from becoming heavy.

Jump to Recipe
Prep Time20 mins
Cook Time25 mins
Total Time3 hrs 45 mins
Servings16
DifficultyEasy

Ingredients

For the Crust

  • 1 1/2 cups graham cracker crumbs
  • 1/4 cup granulated sugar
  • 6 tablespoons unsalted butter, melted

For the Filling

  • 2 cans (14 ounces each) sweetened condensed milk
  • 4 large egg yolks
  • 3/4 cup key lime juice
  • 1 tablespoon finely grated lime zest
  • 1/4 teaspoon salt

For Serving

  • Whipped cream
  • Thin lime slices or extra zest

Substitutions

  • Use regular Persian limes when Key limes are unavailable; the flavor will be slightly less floral.
  • Use gluten-free graham crackers for a gluten-free crust.
  • Use sweetened condensed coconut milk for a dairy-free variation, noting that the set may be softer.

Instructions

Step 1: Prepare the pan

Heat the oven to 350°F. Line an 8-inch square pan with parchment, leaving overhang on two sides.

Step 2: Bake the crust

Mix graham crumbs, sugar, and butter. Press firmly into the pan and bake for 10 minutes.

Bake the crust for Key Lime Pie Bars

Step 3: Mix the filling

Whisk condensed milk, yolks, lime juice, zest, and salt until smooth and slightly thickened.

Mix the filling for Key Lime Pie Bars

Step 4: Bake

Pour over the warm crust and bake 14 to 16 minutes, until the center is set but still has a slight wobble.

Bake for Key Lime Pie Bars

Step 5: Chill and slice

Cool completely, then refrigerate at least 3 hours. Lift from the pan and cut into 16 bars.

Finished Key Lime Pie Bars ready to serve

How to Store Leftovers

Cool Key Lime Pie Bars completely before covering. Store it airtight at cool room temperature for up to 2 days, or refrigerate for up to 4 days if the kitchen is warm or the recipe contains fresh fruit.

How to Reheat

Serve Key Lime Pie Bars at room temperature unless the recipe is intended warm. Heat individual portions briefly and avoid overheating frosting, glaze, or fruit filling.

Serving Ideas

  • Powdered sugar or whipped cream
  • Fresh berries
  • Coffee or tea
  • A dessert platter

Common Mistakes to Avoid

  • Overmixing after flour is added.
  • Cutting or frosting before cooling.
  • For Key Lime Pie Bars, relying on color alone instead of the center cue.

Nutrition Information

Nutrient Per Serving
Calories 285
Protein 5g
Carbohydrates 43g
Fat 11g
Sugar 34g

Nutrition is an estimate and can vary with brands, portion size, and substitutions.

Frequently Asked Questions

What is the clearest doneness cue for Key Lime Pie Bars?

Pour over the warm crust and bake 14 to 16 minutes, until the center is set but still has a slight wobble.

What substitution works well in Key Lime Pie Bars?

Use regular Persian limes when Key limes are unavailable; the flavor will be slightly less floral.

About the Author

Written and edited by the FreshFork Recipes Team.

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