Buttercream birthday cakes

100% Buttercream~ I frosted entire cake in white BC. Then I took one or two different shades of green and put small amounts here and there on bottom 1/2 of cake and smoothed....

I frosted sides w/ chocolate buttercream, or you can tint BC brown. Then I added small amounts of black around sides w/ #3 or #4 tip and smoothed up around top. Then I piped white...