Happy New year ! I have a question please on fillings for unbaked cakes, Bettycrocker has a cupcake mix that has a filling you bake in the cupcake. I want to use it for a cake as for the filling how can I do it? I was thing to go circles on top of the batter. batter first, than circles of filling not to close to each other then remaining batter. What do you think ? Thanks