If you are writing for a restaurant, use sensory language to make these "secret" dishes feel like an exclusive privilege for loyal customers.
: "Not everyone knows about our Truffle Mac & Cheese, but for those in the loop, it’s the ultimate comfort food upgrade. Just ask your server." Off the Menu
: Describe why these items aren't on the regular menu. Are they seasonal? Experimental? Too labor-intensive for a rush?. If you are writing for a restaurant, use