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a slice of banana cake on a white plate.

Banana Cake with Vanilla Frosting

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Put those overripe bananas on your counter to good use with this delicious Banana Cake! It's topped with creamy vanilla frosting and makes a perfect treat!
Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings 12
Calories 206

Ingredients

To make the cake:

  • 2/3 cup white granulated sugar
  • 1/2 cup sour cream
  • 1 egg
  • 2 Tablespoons butter, softened
  • 2 medium bananas, mashed
  • 1 teaspoon vanilla extract
  • 1 cup all purpose flour
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt

To make the frosting:

  • 2 Tablespoons butter, softened
  • 1 1/4 cups powdered sugar
  • 2-3 Tablespoons milk
  • 1/2 teaspoon vanilla extract

Instructions

  • Preheat oven to 350 degrees. Spray an 8x8 baking pan with cooking spray and set aside.
  • Using an electric mixer, beat together the sugar, sour cream, egg, and softened butter over medium speed until combined. Add in the mashed bananas and vanilla extract. 
  • Stir in the flour, baking soda, and salt by hand, mixing until just combined. Pour into the prepared baking dish and bake in the preheated oven for 22-28 minutes, until top is golden brown and a toothpick inserted in the center comes out clean.
  • Cool completely on a wire rack.
  • To make the frosting, beat the butter, powdered sugar, milk, and vanilla extract with an electric mixer until smooth. Evenly spread over the cooled cake and serve. I like to sprinkle the frosted cake with a little cinnamon for an extra boost of flavor and color, but this is optional! Refrigerate any leftovers.

Notes

  • The recipe can be doubled and baked in a 9x13 baking dish.
  • Use room temperature butter, sour cream, and egg for the cake. This will help your ingredients to incorporate more smoothly.
  • Add a sprinkle of cinnamon on top of your frosted banana cake for a pretty presentation and a little flavor boost!
  • To make your banana snack cake in advance, prepare as directed 1-2 days ahead of time and store covered in the refrigerator. I do recommend removing it from the refrigerator and allowing it to come closer to room temperature about 1-2 hours before serving.
  • Store the frosted cake, covered, on the counter for up to 3 days.
  • You can also freeze your banana snack cake for up to 6 months. Allow it to thaw on the counter top before enjoying.

Nutrition

Calories: 206kcal | Carbohydrates: 36g | Protein: 2g | Fat: 6g | Saturated Fat: 3g | Cholesterol: 28mg | Sodium: 93mg | Potassium: 103mg | Sugar: 26g | Vitamin A: 210IU | Vitamin C: 1.8mg | Calcium: 18mg | Iron: 0.6mg