Chocolate Peanut Butter Cupcakes

INGREDIENTS

For the filling:

1 cup

confectioners' sugar

3/4 cup

creamy peanut butter

4 tbsp

unsalted butter, at room temperature

1/2 tsp

vanilla extract

For the cake:

1 2/3 cups

all-purpose flour

3/4 cup

unsweetened cocoa powder

1 tsp

baking soda

1/2 tsp

salt

1 cup

sour cream

2 tbsp

milk

1 tsp

vanilla extract

8 tbsp

unsalted butter, at room temperature

1 1/2 cups

sugar

large eggs

For the frosting:

8 oz

cream cheese, at room temperature

4 tbsp

unsalted butter, softened

1/2 cup

creamy peanut butter

3 1/4 cups

confectioners' sugar

1 cup

frozen whipped topping, thawed

Garnish:

mini chocolate chips