Yields 24 cupcakes
For the filling:
1 cup confectioners’ sugar
¾ cup creamy peanut butter
4 tbsp. unsalted butter, at room temperature
½ tsp. vanilla extract
1 cup confectioners’ sugar
¾ cup creamy peanut butter
4 tbsp. unsalted butter, at room temperature
½ tsp. vanilla extract
For the cake:
1 2/3 cups all-purpose flour
¾ cup unsweetened cocoa powder
1 tsp. baking soda
½ tsp. salt
1 cup sour cream
2 tbsp. milk
1 tsp. vanilla extract
8 tbsp. unsalted butter, at room temperature
1½ cups sugar
2 large eggs
1 2/3 cups all-purpose flour
¾ cup unsweetened cocoa powder
1 tsp. baking soda
½ tsp. salt
1 cup sour cream
2 tbsp. milk
1 tsp. vanilla extract
8 tbsp. unsalted butter, at room temperature
1½ cups sugar
2 large eggs
For the frosting:
8 oz. cream cheese, at room temperature
4 tbsp. unsalted butter, softened
½ cup creamy peanut butter
3¼ cups confectioners’ sugar
8 oz. cream cheese, at room temperature
4 tbsp. unsalted butter, softened
½ cup creamy peanut butter
3¼ cups confectioners’ sugar
1 cup frozen whipped topping, thawed
2 Butterfinger bars, crumbled (optional)
Directions:
Preheat the oven to 350° F. Line two cupcake pans with paper liners.
Preheat the oven to 350° F. Line two cupcake pans with paper liners.
To make the filling, combine the confectioners’ sugar, peanut butter, butter and vanilla extract in a bowl. Beat with an electric mixer on medium speed until well combined. Roll the mixture into 1-inch balls (at least 24) and set aside on a baking sheet.

Spoon a tablespoon or two of batter into the bottom of each cupcake liner. Place a ball of the peanut butter filling in each cupcake well and top with the remaining batter so that all the cups are filled. Bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean. Allow to cool in the pan for 5-10 minutes, then transfer to a wire rack to cool completely.
To make the frosting, in the bowl of an electric mixer fitted with the paddle attachment, combine the cream cheese, butter and peanut butter until smooth. Slowly mix in the confectioners’ sugar, beating until smooth and well blended. Mix in the whipped topping until smooth and fluffy. Frost cooled cupcakes as desired. (I topped mine with crumbled butterfinger bars-- yumminess!)
Source: Proceed with Caution