This frosting is a sumptuous addition to a spice cake, apple dump cake and even a plain, old yellow cake. The brown sugar helps elevate it beyond a basic buttercream and adds a definite fall flavor.
Brown Sugar Buttercream Frosting
5 egg whites
1 2/3 cups brown sugar, packed
1/4 teaspoon salt
4 sticks butter, softened
Create a double broiler by placing a large glass bowl over a pan of boiling water (water should be at a slow boil or simmer). To the top bowl combine egg whites, brown sugar, and salt. Continuously whisk mixture for 4 minutes.
Remove from heat and beat with a mixer on high until stiff, glossy peaks form, about 6 minutes. Add butter, 2 tablespoons at a time, beating on medium speed after each addition (the mixture will deflate slightly as butter is added). Beat until frosting is smooth and glossy, 3 to 5 minutes.