These cakes can also be made in an 8-inch square baking dish. Just prepare the cake as directed, and assemble everything in the baking dish. Bake 5 to 10 minutes longer.
I like these best when served warm, but they can be made ahead and served at room temperature. Just make sure to do the final drizzle of caramel right before serving, and warm the caramel in the microwave 30 seconds. This will warm up the cakes without having to reheat them.