My suggestion, if you're up for some experimenting, is to start out with a
blended drink consisting of 1 part cream or milk, 2 parts Godiva Milk
Chocolate Liqueur, with maybe a small splash of Frangelico, amaretto, or maybe
Kahlua. The recipe sounds like a house recipe, which means basically that
unless one of us actually works(ed) there, nobody here will know it.
Then again, I could be wrong, it could just be a drink I've never heard of
that's quite common elsewhere.
Regardless, good luck!