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Chilled knife slicing key lime bars on a white kitchen counter. Topped with whipped cream and lime zest.

Key Lime Pie Bars

Bright, creamy, and irresistibly tangy, these key lime pie bars feature a buttery graham cracker crust and a smooth lime filling, all topped with whipped cream and zest. Easy to make, perfect for summer gatherings, and designed for that homemade, Florida-inspired flavor in every bite.
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Course: Dessert
Cuisine: American, southern
Prep Time: 15 minutes
Cook Time: 25 minutes
Chill Time: 1 hour
Total Time: 1 hour 40 minutes
Servings: 9 bars
Calories: 365kcal
Cost: $8

Equipment

  • 1 8x8 inch baking pan (Line with parchment paper)
  • 1 Mixing bowl (Medium to large size)
  • 1 Whisk (For combining filling ingredients)
  • 1 Microplane or zester (For lime zest)
  • 1 Citrus juicer (Or reamer, for fresh lime juice)
  • 1 Food processor (Or zip-top bag and rolling pin for crust)
  • 1 Oven (Preheated to 350°F)
  • 1 Sharp knife (Clean between cuts for smooth edges)

Ingredients

  • 9 sheets Graham crackers - About 1½ cups crumbs
  • 6 tablespoon Unsalted butter - Melted
  • 2 tablespoon Granulated sugar
  • 1 pinch Salt - Optional, enhances flavor
  • 2 cans Sweetened condensed milk - 14 oz each
  • 4 Egg yolks - Large eggs
  • 0.5 cup Fresh key lime juice - Or regular limes in a pinch
  • 2 teaspoon Lime zest - Preferably from fresh key limes
  • 2 teaspoon Vanilla extract - Optional but adds depth
  • 0.5 cup Heavy cream - Whipped, for topping
  • Lime slices - For garnish

Instructions 

  • Preheat oven to 350°F and line an 8x8 pan with parchment paper.
  • Crush graham crackers into fine crumbs and mix with melted butter, sugar, and salt.
  • Press mixture into the pan firmly to form a crust.
  • Bake crust for 10 minutes until lightly golden. Let cool slightly.
  • Zest and juice the limes, then whisk together condensed milk, egg yolks, zest, and vanilla.
  • Pour filling over cooled crust and smooth the top.
  • Bake for 15 minutes, until edges are set and center has slight jiggle.
  • Cool completely at room temp, then refrigerate at least 4 hours or overnight.
  • Lift from pan and slice using a clean knife wiped between cuts.
  • Top each square with whipped cream, lime zest, and a lime slice before serving.

Notes

Nutrition facts are estimated using automated tools and may vary based on ingredients and portion sizes. For the most accurate results, please calculate using your specific ingredients.

Nutrition

Serving: 1bar | Calories: 365kcal (18%) | Carbohydrates: 45g (15%) | Protein: 6g (12%) | Fat: 18g (28%) | Saturated Fat: 11g (69%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Cholesterol: 100mg (33%) | Sodium: 170mg (7%) | Potassium: 240mg (7%) | Fiber: 1g (4%) | Sugar: 37g (41%) | Vitamin A: 580IU (12%) | Vitamin C: 3mg (4%) | Calcium: 190mg (19%) | Iron: 1.2mg (7%)