Banana Cake with Cake Mix

slice of banana cake with chocolate frosting

4.61 from 38 votes

This Easy Banana Cake is made with cake mix and topped with a buttery chocolate frosting. This banana cake is loaded with real banana flavor in every single bite.

Prep Time15

Cook Time25

Total Time1

Servings: slices

Author: Miranda Couse

Ingredients

Cake

15.25 ounce yellow cake mix
3 ripe bananas peeled and mashed
1/2 cup vegetable oil
2 large eggs
1 teaspoon vanilla extract

Frosting

1 cup butter room temperature
1/2 cup unsweetened cocoa powder
4 cups powdered sugar
1 teaspoon vanilla extract
4 - 5 tablespoons heavy cream

Instructions

Cake

Preheat oven to 350 degrees. Spray a 9x13 baking pan with nonstick baking spray.
Add the peeled 3 ripe bananas to a large bowl and mash with a fork.
Add 1/2 cup vegetable oil, 2 large eggs, and 1 teaspoon vanilla extract. Using a whisk, mix until combined.
Add in the 15.25 ounce yellow cake mix until whisk until all ingredients are blended together.
Pour the batter in the prepared pan. Spread the batter evenly in the pan.
Place in the oven and bake for 25 to 30 minutes or until a toothpick inserted in the middle comes out clean or with moist crumbs.
Cool completely before frosting.

Frosting

In a large mixing bowl, add in the 1 cup butter and 1/2 cup unsweetened cocoa powder. Beat with a hand mixer until creamy.
Add in the 4 cups powdered sugar, 1 teaspoon vanilla extract, and 4 tablespoons heavy cream. Continue to beat until combined. You may add additional heavy cream 1 tablespoon at a time to get the desired consistency of frosting.
Spread the frosting on top of the cake with an offset spatula.
Cut and serve.

Notes

Storage: Store this cake covered or in an airtight container at room temperature for 3 to 4 days or in the fridge for up to a week.

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