This is a great cake! I just used a Devil Food's boxed cake because I didn't want to go to all the trouble for the cake but the frosting was really great! The recipe is below!
Kathleen's Peanut Butter Icing:
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.
Also this is my new favorite kitchen tool! The wire is adjustable so that you can slice your cake for perfect layers!!!