Peanut butter frosting

I made a Reese's peanut butter cake for Derek's birthday. The chocolate cake was average but the frosting was AMAZING! Forget frosting the cake, just eat this frosting! I found this recipe on the food network. It was a recipe by Ina Garten (aka the Barefoot Contessa). She called it Kathleen's Peanut butter frosting. Thank you Kathleen! Whoever you are.
1 cup creamy peanut butter
1 cup powdered sugar
5 Tablespoons unsalted butter, at room temperature
3/4 teaspoon pure vanilla extract
1/4 teaspoon salt
1/3 cup heavy cream
Beat the first five ingredients on medium-low speed until creamy. Be sure and scrape down the sides of the bowl periodically. Add the cream and beat on high until it's light and smooth.