The next best thing to having it cover my all time favorite cake, is to make graham cracker cookies with the leftover frosting. A.maz.ing!
1/4 cup butter
3/4 cup brown sugar
4 Tbsp. milk
1 3/4 cups powdered sugar
Melt butter in saucepan. Stir in brown sugar.
Cook over low heat for 2 minutes.
Cool to lukewarm without stirring. Add powdered sugar; beat well until spreadable consistency reached. Thin with more milk if necessary.