My husband has requested a cake with the following six flavors for his birthday: chocolate, pumpkin, cinnamon, caramel, and marshmallow. I've written them in the approximate order of how the flavors should be prioritized. It seems easy enough to make a chocolate-pumpkin cinnamon cake, fill with caramel and ice with marshmallow buttercream, but all five flavors need to be distinctly represented.
Here's what I'm thinking: a three-layer cake with two chocolate layers (top and bottom) and one pumpkin (middle). Caramel filling/ganache/something like that between the layers. Some sort of cinnamon swirl just on top - or maybe the pumpkin layer can have a cinnamon swirl in it? Do you think this would be possible, with a very visible dark swirl? I can make a marshmallow buttercream and just lightly pipe decorations instead of swathing the whole cake in it, since I'm worried about things getting messy, gloppy, and overly sweet.
Thanks in advance!