Brilliant idea. Whomever works for Starbucks and came up with this logic is probably rich right now. The cake didn't even taste cooked to be honest, but it was so lovely.
The nuts and marshmallows, delicious! Melted chocolate on the outside, I can't even begin to describe it. I'm going to go looking for a recipe to duplicate this. Get on board guys, try it. You'll never go back to cake on a plate again.