Make layered cakes. Prepare batter following recipe directions. Bake two 10 in. cake layers, four 8 in. cake layers and one 6 in. cake layer. Cool cakes completely.
Prepare buttercream icing following recipe directions. Tint portion teal. Reserve remaining white. Level, fill and stack 8 in. cakes on same size cake circle for a 4-layer cake, 8 in. high. Level 6 in. cake and place on cake circle for a 1-layer cake, 3 in. high. Level, fill and stack 10 in. cakes on cake circle, for 2-layer cake, 4 in. high.
Use spatulas and teal icing to ice 10 in. cake smooth. Use spatulas and white icing to ice remaining cakes smooth. Reserve remaining teal and white icing
Prepare cakes for stacked construction.