A double 10" round will not give you 75 servings.
A 14" double round will serve 63-82. A 12x12 double square will serve 48-72. The larger number is only if cut using wedding...
Lorillc....that is (normally) a small (6" single) cake for the birthday child to have to him/herself. They eat/destroy it. I wish they were around when my son turned one.
If their order is over $100..I throw in the smash cake. But with very simple decorations. If their cake is under $100...then I charge $10..again, for a simple deco. If they want all the bells & whistles...
Keep gathering information from Cake Central and the internet. There is tons of information available. Only tackle what you are comfortable doing. I took extreme baby steps because I was so cake intimidated....
My double layer cakes when finished are high. But that's because I top them that way. I'd rather give the customer a nice tall cake than throw away/eat all the cake tops.
Your not stupid...there is a lot of different information on the internet. It is not all wrong.
I'm not sure what Meringue powder does to butter cream. I think it is an unnecessary...
1. Meringue powder does not create crust----Powdered sugar does.
2. Butter should help it spread more easily.
3. Home made cream cheese should not set out. "Cooled"...