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Double Chocolate Banana Layer Cake sliced with chocolate frosting and banana slices on top
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Double Chocolate Banana Layer Cake

Indulge in the ultimate dessert experience with this Double Chocolate Banana Layer Cake! Packed with rich chocolate flavor and the natural sweetness of ripe bananas, this cake is both decadent and surprisingly simple.
Prep Time20 minutes
Cook Time35 minutes
Total Time55 minutes
Course: Dessert
Cuisine: American
Keyword: Banana, Cake, Chocolate
Servings: 10 servings
Calories: 480kcal

Equipment

  • Mixing Bowl
  • Cake Pans
  • Whisk
  • Spatula

Ingredients

Ingredients

  • 3 pieces Ripe bananas, mashed
  • 2 cups All-purpose flour
  • 3/4 cup Unsweetened cocoa powder
  • 2 teaspoons Baking soda
  • 1 teaspoon Baking powder
  • 1/2 teaspoon Salt
  • 2 large Eggs
  • 1 cup Buttermilk
  • 1/2 cup Vegetable oil
  • 1 teaspoon Vanilla extract
  • 1 1/2 cups Granulated sugar
  • 1 cup Unsalted butter, softened For frosting
  • 3 1/2 cups Powdered sugar For frosting
  • 3/4 cup Unsweetened cocoa powder For frosting
  • 1/2 cup Heavy cream For frosting
  • 2 teaspoons Vanilla extract For frosting
  • 1 pinch Salt For frosting
  • Chocolate shavings (for garnish)
  • Banana slices (for garnish)

Instructions

  • Preheat oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper.
  • In a bowl, whisk together flour, cocoa powder, baking soda, baking powder, and salt.
  • In a large bowl, beat eggs, sugar, buttermilk, oil, and vanilla extract until smooth.
  • Stir in mashed bananas until combined.
  • Gradually mix in the dry ingredients, stirring until just combined. Do not overmix.
  • Divide the batter between the two pans and bake for 30–35 minutes, or until a toothpick comes out clean.
  • Cool in pans for 15 minutes, then transfer to wire racks to cool completely.
  • To make frosting: Beat butter until creamy. Gradually add powdered sugar and cocoa powder, mixing well.
  • Add heavy cream, vanilla, and a pinch of salt. Beat until fluffy and smooth.
  • Assemble by layering cake and frosting, then frost the top and sides. Garnish with chocolate shavings and banana slices.
  • Chill for 30 minutes before slicing and serving.

Notes

To make homemade buttermilk: combine 1 cup milk with 1 tbsp vinegar or lemon juice and let sit for 5 minutes. Store leftovers covered in the fridge for up to 5 days, or freeze slices for up to 3 months. Great with nuts, berries, or even espresso powder added to the frosting!

Nutrition

Calories: 480kcal | Fat: 27g