Bake and cool a 2-layer round cake. Stack cooled cake layers using buttercream icing or another favorite filling between layers. Place on a foil-wrapped cake circle.
Position cake on turntable to decorate. Tint white buttercream icing ivory. Spatula ice cake smooth with ivory buttercream icing.
Decorate tops and side of cake using tip #2 chocolate buttercream icing sotas or cornelli lace. Shape a tip #5 mound of chocolate buttercream icing at top of cake; attach malted milk balls on icing and to each other with additional icing. Arrange additional malted milk balls around bottom border of cake with dots of icing.