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Super easy key lime cake is bursting with fresh lime flavor and topped with whipped cream. It's a delicious summer cake recipe, and if you love key lime pie - then definitely give this recipe a try. 

Key Lime Cake Recipe

This super easy key lime cake is bursting with fresh lime flavor and topped with whipped cream. It's a delicious summer cake recipe, and if you love key lime pie - then definitely give this recipe a try. 
Course Dessert
Cuisine American
Prep Time 30 minutes
Cook Time 30 minutes
Cooling 30 minutes
Total Time 1 hour
Servings 18 slices
Calories 58 kcal
Author Fiona Dowling

Ingredients

Key Lime Cake

  • 1 box cake mix , vanilla, yellow or white
  • 1/2 cup oil
  • 3 large eggs
  • 3/4 cup sour cream
  • 2 tablespoons lime zest
  • 1/3 cup freshly squeezed lime juice

Key Lime Syrup

  • 3 tablespoons lime juice
  • 3 tablespoons sugar

Topping

  • 2 cups whipped topping , or whipped cream
  • 1 tablespoon lime zest

Instructions

Key Lime Cake

  1. Preheat the oven to 350F degrees (or 325F degrees if using a glass pan). Grease and flour the bottom and sides of a 9x13 inch pan. 

  2. Add the cake mix, eggs, sour cream, 1/2 c oil, lime juice and lime zest to a large bowl.

  3. Beat with an electric mixer until smooth.

  4. Pour the batter into the prepared pan and bake for 27-32 minutes or until an inserted toothpick comes out clean and if you give the pan a gentle nudge the cake doesn't wobble in the middle.

  5. Remove from the oven and allow to cool.

Lime Syrup

  1. In a small saucepan over low heat add the lime juice and sugar. Heat until the sugar dissolves while gently stirring.

  2. When the cake is out of the oven, take a small pastry brush or a spoon and brush/drizzle the syrup over top.

Topping

  1. Spread the whipped topping over top of the cooled cake. Then sprinkle with lime zest.

  2. Cut into slices and serve. 

Recipe Notes

*If making the cake ahead of time, make the cake the night before and drizzle with the lime syrup. Cover tightly and leave at room temperature over night.  Add the whipped topping before serving.

**Once the cake has been decorated with whipped topping or whipped cream, cover and store in the fridge. 

Nutrition Facts
Key Lime Cake Recipe
Amount Per Serving
Calories 58 Calories from Fat 27
% Daily Value*
Fat 3g5%
Saturated Fat 2g13%
Cholesterol 36mg12%
Sodium 25mg1%
Potassium 41mg1%
Carbohydrates 5g2%
Sugar 4g4%
Protein 1g2%
Vitamin A 110IU2%
Vitamin C 2.5mg3%
Calcium 22mg2%
Iron 0.2mg1%
* Percent Daily Values are based on a 2000 calorie diet.