How to Make a Baked Potato Cake

Don't call this a small potato: It's a cake that weighs about 15 times the average russet. 

Preheat the oven to 350 degrees. Coat three 9-inch-roundcake pans with cooking spray. Prepare the cake mixes as directed; divide the batter evenly among the pans and bake 30 to 35 minutes. Let cool.

Make the "potato skin" frosting: Beat the butter and milk with a mixer until smooth. Beat in the cocoa powder. Beat in the confectioners' sugar, 1 cup at a time, until the mixture is as thick as cookie dough. Form into 2 disks, wrap in plastic and refrigerate.

Level the domed tops of 2 cakes with a serrated knife. Stack the flat cakes on a cardboard circle with vanilla frosting between each; use the remaining domed layer on top. Freeze 30 minutes.