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A slice of Key Lime Cake topped with cream cheese frosting on a decorative plate.
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Key Lime Cake with Cream Cheese Frosting

A delightful cake that combines moist, zesty key lime flavors with a creamy cream cheese frosting, perfect for summer celebrations.
Prep Time30 minutes
Cook Time25 minutes
Total Time55 minutes
Course: Cake, Dessert
Cuisine: American, Baked Goods
Keyword: Cream Cheese Frosting, Key Lime Cake, Summer Dessert, Zesty Cake
Servings: 12 servings
Calories: 350kcal

Ingredients

For the Cake

  • 2 1/2 cups all-purpose flour Light and airy, it forms the backbone of this cake.
  • 2 1/2 tsp baking powder Ensures your cake rises beautifully.
  • 1/2 tsp baking soda Adds to the fluffiness.
  • 1/2 tsp salt Balances sweetness for a harmonious flavor.
  • 3/4 cup unsalted butter, softened Rich, creamy goodness that gives the cake its moist texture.
  • 1 3/4 cups granulated sugar Sweetness that complements the tartness of the lime.
  • 4 large eggs Essential for binding and providing structure.
  • 1/4 cup key lime juice The star ingredient that infuses the cake with zesty flavor.
  • 1 tbsp key lime zest Adds an aromatic finish.
  • 1 tsp vanilla extract A hint of warmth to round out the flavors.
  • 1 cup buttermilk Ensures a tender crumb and depth of flavor.

For the Frosting

  • 8 oz cream cheese, softened The base of the luscious frosting.
  • 1/2 cup unsalted butter, softened Adds a creamy touch to the frosting.
  • 4 cups powdered sugar Sweetness and stability for the frosting.
  • 2 tbsp key lime juice Intensifies the flavor of the frosting.
  • 1 tsp vanilla extract For an added layer of flavor.
  • 1–2 tsp lime zest (for garnish) A pop of freshness and color.

Instructions

Preparation

  • Preheat your oven to 350°F (175°C). Grease and line three 8-inch round cake pans with parchment paper.
  • In a medium bowl, whisk together all-purpose flour, baking powder, baking soda, and salt.
  • In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy (about 2-3 minutes).
  • Add the eggs one at a time, mixing well after each addition.
  • Mix in the key lime juice, key lime zest, and vanilla extract until well blended.
  • Gradually add the flour mixture and buttermilk, starting and ending with the flour, until just combined.

Baking

  • Divide the batter evenly between the three prepared pans. Bake for 22-25 minutes or until a toothpick inserted in the center comes out clean.
  • Let the cakes cool in their pans for about 10 minutes before transferring to wire racks to cool completely.

Frosting and Assembly

  • Beat the softened cream cheese and butter until smooth and fluffy. Gradually add powdered sugar, then mix in lime juice and vanilla extract.
  • Layer the cooled cakes on a serving stand or plate, spreading cream cheese frosting between each layer and over the top and sides.
  • Garnish with a sprinkling of lime zest on top.

Notes

For the best results, use room temperature ingredients. Check cakes a few minutes before the baking time ends. For lighter frosting, consider using half cream cheese and half whipped cream.