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–+ servings
A slice of triple berry cake with raspberry buttercream.

Triple Berry Cake with Buttercream Frosting

Katelyn Theofanis
This easy triple berry cake is full of juicy berries and delicious flavor. Dreamy raspberry buttercream finishes the delicately sweetened cake for a well-balanced, delicious bite. This cake recipe is small-batch and uses simple ingredients.
4.80 from 5 votes
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Course Dessert
Cuisine American
Servings 12 servings
Calories 393 kcal

Equipment

Ingredients
  

  • 1¾ cup all-purpose flour plus 1 tablespoon to coat the berries
  • 1 teaspoon baking powder
  • ¼ teaspoon baking soda
  • ¼ teaspoon salt
  • ½ cup granulated sugar
  • ⅓ cup light brown sugar packed
  • ½ cup unsalted butter melted
  • 1 teaspoon lemon zest
  • ¾ cup sour cream
  • 1 large egg room temperature and lightly beaten
  • 2 teaspoon pure vanilla extract
  • 1½ cups fresh raspberries, blueberries, and chopped strawberries

Raspberry Buttercream

  • ½ cup unsalted butter softened
  • 1 teaspoon vanilla extract
  • 2 cups powdered sugar sifted
  • 1 tablespoon milk or cream plus more if needed
  • 2 tablespoon raspberry jam

Instructions
 

  • Preheat the oven to 350° F. Grease and line an 8-inch square baking pan with parchment paper. Toss the berries in the extra tablespoon of flour in a small bowl.
  • Whisk the flour, baking powder, baking soda, and salt in a medium-sized bowl until combined.
  • Mix the sugar, melted butter, sour cream, lemon zest, egg, and vanilla extract in a large bowl until incorporated. Add the dry ingredients and mix just until combined. Fold in the berries.
  • Pour the batter into the prepared baking pan and smooth it into an even layer.
  • Bake the cake for 40-45 minutes, until golden brown and a toothpick inserted into the center comes out clean.
  • Allow the cake to cool before removing it from the pan. Cool the cake completely before frosting.
  • Make the Buttercream - Beat the butter until soft and fluffy using an electric mixer. Scrape the bowl and add the sugar, vanilla extract, jam, and 1 tablespoon milk. Beat until light and fluffy. Frost the top of the cooled cake.

Nutrition

Calories: 393kcalCarbohydrates: 54gProtein: 3gFat: 19gSaturated Fat: 11gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gTrans Fat: 1gCholesterol: 65mgSodium: 123mgPotassium: 73mgFiber: 1gSugar: 38gVitamin A: 596IUVitamin C: 1mgCalcium: 53mgIron: 1mg
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