We've not tried this yet, but I can't wait to! From Easy to Bake, Easy to Make. I think I'm going to try substituting the white chocolate for marshmellows. I'm also going to try omitting the cocoa and serving this with warm caramel topping sometime. If you don't have any stale bread to use up, let a couple of slices sit out uncovered for a couple of hours before using. Prep time includes cutting up the bread. Bake time includes standing time.