I used two batches of this frosting on the Chocolate Peanut Butter Cake I made Wednesday for a friend's 30th birthday. My husband can't wait for me to use this again on chocolate cupcakes!
Peanut Butter Frosting (Ina Garten)
1 cup confectioners' sugar
1 cup creamy peanut butter
5 tablespoons unsalted butter, at room temperature
3/4 teaspoon pure vanilla extract
1/4 teaspoon kosher salt
1/3 cup heavy cream
Place the confectioners' sugar, peanut butter, butter, vanilla, and salt in the bowl of an electric mixer fitted with a paddle attachment. Mix on medium-low speed until creamy, scraping down the bowl with a rubber spatula as you work. Add the cream and beat on high speed until the mixture is light and smooth.