While the vouchers don't say they prohibit anything save the Kitchen Sink at Beaches and Cream, my experience is that any menu item designated on the menu as being for more than one, also requires more than one voucher. I got the Volcano, but it was the dessert for two of the vouchers. Same for appetizers that are listed as for two. Not that I am complaining about it. I think that is fair, and actually am glad they allow you to order such items by combining vouchers intead of just prohibiting them outright.