Make layered cakes. Prepare batter following recipe directions. Bake one 12 in. cake layer, three 10 in. cake layers, one 8 in. cake layer and three 6 in. cake layers. Cool cakes completely.
Prepare buttercream icing following recipe directions. Tint ivory. Level, fill and stack 10 in. cakes on cake circle, for a 3-layer cake, 6 in. high, and 6 in. cakes on cake circle, for a 3-layer cake, 6 in. high. Use spatula and white icing to ice both cakes fluffy. Prepare cakes for stacked construction.
Level 12 in. and 8 in. cakes on cake circles, for 1-layer cakes, 2 in. high. Use spatula to lightly ice layers.