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cupcake with chocolate frosting sitting on a plate with more peanut butter cupcakes in the background

Peanut Butter Cupcakes with Chocolate Frosting

Peanut butter cupcakes with chocolate frosting will be your new favorite way to get your chocolate and peanut butter fix!
Course Dessert
Cuisine American
Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes
Servings 22 people
Author Kelsie

Ingredients

Cupcakes:

  • 1 3/4 cups all-purpose flour
  • 3/4 teaspoon baking powder
  • 1/4 teaspoon baking soda
  • 1/2 teaspoon salt
  • 12 tablespoons unsalted butter at room temperature
  • 1 1/3 cups granulated sugar
  • 2/3 cup creamy peanut butter can use natural
  • 3 large eggs at room temperature
  • 1/2 teaspoon vanilla extract
  • 1/2 cup full-fat sour cream at room temperature
  • 3/4 cup coarsely chopped roasted salted peanuts

Frosting:

  • 1 cup unsalted butter at room temperature
  • 3 to 4 cups powdered sugar
  • 1/2 cup cocoa powder
  • 4 to 6 tablespoons milk or heavy cream
  • 1/4 teaspoon salt or more to taste
  • chopped roasted salted peanuts for garnish if desired

Instructions

Cupcakes:

  1. Preheat oven to 375 degrees. Line 22 muffin cups with paper liners and set pans aside.
  2. Whisk the flour, baking powder, baking soda, and salt together in a mixing bowl. Set bowl aside.
  3. Cream the butter and sugar together in a large mixing bowl with an electric mixer until light and fluffy. With mixer on low, beat in the peanut butter. Add the eggs one at a time, beating until just incorporated, and stopping mixer to scrape the bowl after each addition. Beat in vanilla.
  4. Gradually add the dry ingredients and mix until just incorporated, then beat in sour cream. Batter will be very thick. Fold in the peanuts with a rubber spatula.
  5. Divide batter between prepared muffin cups, filling 3/4 full. Bake 20 to 25 minutes, until a cake tester inserted into the center of the cupcakes comes out clean. Cool completely in muffin tins set on a wire rack before frosting.

Frosting:

  1. Once cupcakes are cool, make the frosting. Beat butter until very smooth, then add 3 cups powdered sugar, the cocoa powder, 3 tablespoons milk, and salt and mix to combine. Scrape down the sides and bottom of the bowl, then turn mixer to medium and beat for a minute or two, until frosting is smooth. Add additional powdered sugar if frosting is too thin and additional milk if frosting is too thick. Frost cupcakes and sprinkle chopped peanuts as desired.