You gave me advice on the tiered cake with the satelites the other day about using styrofoam. The cake will be 6,9,12. Should I use a 10 inch styrofoam to display the cake so I can tuck the edge of the satelites under a little or should I use a 12 inch styrofoam the same size as the cake. I was thinking if he 12 inch cake was on a 12 inch drum it might be sturdy enough to display on a 10 styrofoam. Hope this makes since. Thank you.
You might get a quicker response if you PM'd indydebi. She may not see this post.
I read your original thread:
I see your serving goal is 150. If the cake will be 6"x9"x12", that's already 100 servings. The photo looks like four 8" satellites... if you add that, it's 96 more servings and you're over the 150 goal. If you add six 6" satellites, it's 72 more servings and you're also over the 150 goal.
I'd suggest starting the 3-tier cake with a 6"x8"x10" to serve 74, then add six 6" satellites to serve 72 more to total 146 servings. The six 6" satellites need a 6" styrofoam dummy in the middle... they'll take up about 18.5 - 19 inches of space considering shrinkage, icing, and fondant, so if you're going to place them all on a custom cut base board--it should be 22" or 24" in diameter.
Your 10" base tier would sit on top of the 6" styrofoam dummy and overlap each 6" satellite cake below by approximately 1.5" apiece. You'd have room to add one dowel per 6" satellite for extra support under the 10" tier. If your satellites bake up taller than the 6" dummy, just remember to bring extra 6" cake boards to insert under the dummy to give it the height that you'll need. HTH.