I want to make a cake that I can cut up into little squares to make fondant iced petit four type things out of. I have a tray bake tin that is just the right size for the recipe in the book I'm using, but the recipe is exactly the same as the victoria sponge recipe I use. Won't it rise in the middle? When I make a sponge I always have to slice a bit off the bottom one to make it flat - is there any way of avoiding this in my tray bake?