The Best Banana Cake with Peanut Butter Frosting

Truly the best Banana Cake with Peanut Butter Frosting. Topped with chopped Whoppers just for fun!
Course Dessert
Cuisine American
Keyword best banana cake
Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings 12 people
Calories 383 kcal
Author Anna


!for the cake:

  • 2 and 1/4 cup all-purpose flour
  • 1 c granulated sugar
  • 1/2 c packed light brown sugar
  • 1 and 1/2 tsp baking powder
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 1 c mashed ripe bananas about 2
  • 3/4 c buttermilk
  • 1/2 c vegetable or canola oil
  • 1 tsp vanilla extract
  • 2 large eggs room temperature

!for the frosting:

  • 2 c sifted confectioners' sugar
  • 2 Tbsp unsalted butter softened to room temperature
  • 1/4 c + 1 Tbsp creamy peanut butter
  • 1 tsp vanilla extract
  • 3 Tbsp heavy whipping cream

!for the topping:

  • 1 c chopped Whoppers
US Customary - Metric


!to make the cake:

  1. Preheat the oven to 350 degrees F.
  2. Grease and flour a 13" x 9" pan. Set aside.
  3. In a large mixing bowl, whisk together flour, sugar, baking powder, soda and salt.
  4. In another large mixing bowl, mix together with an electric mixer, bananas, buttermilk, oil and vanilla.
  5. Add dry ingredients and beat on low just until combined.
  6. Add eggs and beat on medium speed for 2 minutes.
  7. Pour the batter into the pan. Smooth out the top.
  8. Bake for 30 minutes or until the toothpick inserted in few places comes out clean.
  9. Cool cake completely in the pan before frosting.

!to make the frosting:

  1. With an electric mixer, beat sugar and both butters until crumbly.
  2. Add vanilla and cream and beat until smooth.
  3. Increase the speed to medium high and beat for 3 minutes until fluffy.
  4. Spread over the cool cake.
  5. Top with chopped Whoppers.
Nutrition Facts
The Best Banana Cake with Peanut Butter Frosting
Amount Per Serving
Calories 383 Calories from Fat 144
% Daily Value*
Fat 16g25%
Saturated Fat 3g19%
Cholesterol 39mg13%
Sodium 257mg11%
Potassium 144mg4%
Carbohydrates 51g17%
Sugar 48g53%
Protein 3g6%
Vitamin A 190IU4%
Vitamin C 1.7mg2%
Calcium 35mg4%
Iron 0.3mg2%
* Percent Daily Values are based on a 2000 calorie diet.