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5 from 1 vote

Key Lime Pie Fudge Recipe

A delicious homemade graham cracker crust topped with tangy but sweet key lime fudge. It's a little taste of summer in every bite.
Prep Time15 mins
Cook Time7 mins
Total Time22 mins
Course: Dessert
Cuisine: American
Keyword: Creamy Fudge, easy fudge, key lime dessert, Key Lime Pie
Servings: 36
Calories: 150kcal


  • 8x8-inch baking pan
  • Wax Paper
  • Heavy Saucepan


Graham Cracker Crust

  • 1 cup finely grated graham cracker crumbs
  • ¼ cup melted butter
  • ¼ cup sugar

Key Lime Filling

  • 5 ounces evaporated milk 1 can
  • 1⅔ cups sugar
  • ½ teaspoon salt
  • 12 large marshmallows
  • 2 cups white chocolate chips
  • ¼ cup lime rind grated (about 4 limes)
  • 2 Tablespoons key lime juice
  • 2 drops green food coloring


Graham Cracker Crust

  • Line an 8x8" pan with wax paper.
  • Mix together graham cracker crumbs, 1/4 cup sugar, melted butter or margarine in a bowl until well blended. Press mixture into prepared pan.
  • Bake at 375 degrees for 7 minutes. Cool completely.

Key Lime Filling

  • Combine the milk, 1 2/3 sugar and salt in a large, heavy saucepan and cook over medium heat until mixture comes to a boil; stirring constantly. Once mixture begins to boil, cook it for 8 minutes, stirring constantly.
  • Remove from heat and stir in the marshmallows, chocolate, food coloring, lime rind and lime and mix well until mixture is melted and smooth. Pour into prepared pan and cool completely. Cut into 1 inch squares to serve.


*If you’re worried about your quality of chocolate, or your chocolate seizing up, I would add in everything else before adding in the chocolate. That way, the mixture cools off just a little bit, but it’s still more than warm enough to melt the chocolate.


Calories: 150kcal | Carbohydrates: 26g | Protein: 1g | Fat: 5g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Trans Fat: 1g | Cholesterol: 7mg | Sodium: 79mg | Potassium: 47mg | Fiber: 1g | Sugar: 22g | Vitamin A: 53IU | Vitamin C: 1mg | Calcium: 33mg | Iron: 1mg