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a piece of key lime cake on a small plate
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5 from 5 votes

Key Lime Cake

Key Lime Cake is a delicious layer cake with the perfect taste of key lime. If a key lime pie and a cake had a baby it would taste like this amazing cake recipe.
Prep Time10 minutes
Cook Time25 minutes
Total Time35 minutes
Servings: 10 pieces
Author: Lisa Longley

Ingredients

Key Lime Cake

  • 3 cups cake flour (360 grams)
  • 2 teaspoons baking powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 1/2 cups sugar (297 grams)
  • 2 large eggs
  • 3/4 cup vegetable oil (148.5 grams)
  • 1 1/4 cup evaporated milk (282.5 grams)
  • 1/3 cup key lime juice (75.6 grams)
  • 1 tablespoon lime zest

Key Lime Frosting

  • 1 cup vegetable shortening (184 grams)
  • 1 cup unsalted butter room temperature (113 grams)
  • 8 cups powdered sugar (908 grams)
  • 1/8 teaspoon salt
  • 7 tablespoons key lime juice (99.3 grams)

Instructions

Key Lime Cake

  • Preheat your oven to 350 degrees Fahrenheit. Prepare three 9 inch cake pans by lining the bottom with parchment paper and greasing the sides of the pan with butter.
  • In a large bowl, sift the cake flour with baking powder, baking soda, salt, and sugar. Set aside. Do not skip this step.
    3 cups cake flour, 2 teaspoons baking powder, 1 teaspoon baking soda, 1/2 teaspoon salt, 1 1/2 cups sugar
  • In a large bowl using a handheld mixer or in the bowl of a stand mixer, beat the egg. Then add in the oil and then the evaporated milk.
    2 large eggs, 3/4 cup vegetable oil, 1 1/4 cup evaporated milk
  • Slowly add the flour mixture to the egg mixture and beat together on medium speed, for about 30 seconds.
  • Stir in the lime juice and zest so that the zest is evenly distributed throughout the batter.
    1/3 cup key lime juice, 1 tablespoon lime zest
  • Evenly divide the batter between the three cake pans. Bake for 20 to 25 minutes or until the cake springs back when lightly touched in the center. Let the cakes cool in the pans for 2 minutes before removing them from the pans to a cooling rack to cool completely.

Key Lime Frosting

  • In the bowl of a stand mixer beat together the shortening and butter. Add in the powdered sugar, salt, and key lime juice and beat until light and fluffy.
    1 cup vegetable shortening, 1 cup unsalted butter, 8 cups powdered sugar, 1/8 teaspoon salt, 7 tablespoons key lime juice
  • To frost add 1/4 cup of frosting and spread it evenly over the top. Add the second cake and frost with another 1/4 cup of frosting. Top with the remaining cake and then frost the top and sides with a thin crum coat. Once the crumb coat has set frost the cake with the remaining frosting. There will be excess frosting if you wish to pipe decorations onto the tops or sides. Top with more lime zest for decoration.

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