Peanut Butter Frosting

I saw Ina Garten make this the other day on her show.  It looked really yummy on top of her chocolate cupcakes (which I will probably never make because there are way too many ingredients!).  But you cannot beat the chocolate/peanut butter combo...so yummy!

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.