My oldest wanted a Ninja Turtle party for is 9th birthday. I made each cake and stacked them the morning of the party. I did end up looking like a leaning tower despite my best efforts. And I did miss covering some of the cake with frosting after I stacked them, but my son still loved it.
I alternated chocolate and white cake for each turtle. I had him put the turtles in order from his most to least favorite, with the favorite being on the bottom. I used a white buttercream frosting and colored it for each turtle. The main green color is Wilton’s Moss Green, which I thought made a really true turtle color. The layers start at 6″ round and go down to 12″ round. I was able to complete backing and frosting all the cakes in one day. I didn’t have too many issues with this cake. The only issue was I did not make enough purple frosting to go completely around the cake the first time, so that was a bit frustrating.