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Banana Cupcakes with Peanut Butter Frosting

These banana cupcakes are a simple way to eat bananas and peanut butter for dessert!

Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 26 minutes
Total Time 41 minutes
Servings 16
Author Kelsie


Banana cupcakes:

  • 3/4 cup mashed very ripe banana about 2 medium bananas
  • 1 teaspoon lemon juice
  • 1 1/2 cups all-purpose flour
  • 3/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 12 tablespoons unsalted butter at room temperature
  • 1 cup granulated sugar
  • 2 eggs
  • 1 1/2 teaspoons vanilla extract
  • 3/4 cup buttermilk

Peanut butter frosting:

  • 6 tablespoons unsalted butter at room temperature
  • 1/2 cup creamy peanut butter
  • 2 1/2 to 3 cups powdered sugar
  • 1/2 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 4 to 6 tablespoons whole milk or half-and-half
  • Dried bananas and roasted salted peanuts for decorating if desired



  1. Preheat oven to 275 degrees. Line 16 muffin cups with paper liners and set pan aside.
  2. Mix the mashed banana with the lemon juice in a small bowl and set aside.
  3. Combine flour, baking soda, and salt in another small bowl and whisk to combine. Set aside.
  4. Cream the butter and sugar together in a large mixing bowl with an electric mixer until light and fluffy. Beat in eggs one at a time, beating well after each addition; beat in vanilla. With mixer set to low, beat in the flour mixture and buttermilk in three additions, beginning and ending with the flour. Stir in banana mixture until just combined.
  5. Divide batter between prepared pans and bake 26 to 30 minutes, until cake springs back when touched lightly with your fingertip. Cool cupcakes completely in pan for 5 minutes then remove to a wire rack to cool completely before frosting.

Peanut butter frosting:

  1. Beat butter on medium speed until light and fluffy, about 2 minutes. Add peanut butter and vanilla and beat for 2 minutes more. Add 2 cups of powdered sugar, 1/2 cup at a time, until combined. Beat in salt and 3 tablespoons milk. Beat frosting for 4 minutes with mixer on high. Adjust to desired consistency by adding milk if too thick or more powdered sugar if too thin.
  2. Frost cupcakes as desired and top with salted peanuts and/or dried bananas.