So I just started doing big projects with cakes and decorating, and a family friend wants me to make a cake for a party. She wants a half sheet (12x18, yes?), half chocolate, half vanilla, with chocolate mousse filling.
What do you think is the best way to go about it?
I've been considering making 2 13x9 cakes, one in each flavor (slicing them horizontally and filling with the mousse) - and then placing them side-by-side to get the 13x18 overall size - But I am worried the two flavors will separate under the icing and it will fall apart in the middle through the icing and everything.
Then I considered buying a 12x18 pan, making the two-flavors in one pan, and then repeating the horizontal cutting and filling - but I am concerned the top layer will fall apart as I'm trying to remove it to fill and then placing it back on top. (Will I need to use flower nails/heating cores with this method? How do I do that with the two flavors?)
Any advice is greatly appreciated!