Fudgy devil's food cake and semisweet chocolate leaves are the ideal contrast for cool mint buttercream.
4-INCH: 2 cups batter, 55 minutes; 8-INCH: 8 cups batter, 1 hour 45 minutes; 12-INCH: 20 cups batter, 1 hour 50 minutes; 16-INCH: 32 cups batter, 2 hours.
Cut each cake horizontally into 5 even layers. Spread 4 layers with buttercream. Stack layers, placing plain layer on top. Thinly coat tiers with buttercream; chill. Smooth fondant onto tiers. Wrap with ribbons; secure with gumarabic. Decorate with chocolate leaves.
4-INCH: 1/4 cup buttercream per layer (1 1/2 cups total), 1 pound fondant; 8-INCH: 1 1/2 cups buttercream per layer (9 cups total), 2 1/2 pounds fondant; 12-INCH: 3 cups buttercream per layer (18 cups total), 3 pounds fondant; 16-INCH: 5 cups buttercream per layer (30 cups total), 6 pounds fondant.
Make this batter recipe 3 1/2 times for a 4-tiered cake. Bake 1 cake for each tier. The finished cake will serve about 225.