Merriam-Webster Collegiate Dictionary - buttery

 I. noun  (plural -teries)  Etymology: Middle English boterie, from Anglo-French, from but cask, butt — more at butt  Date: 14th century  1. a storeroom for liquors  2.  a. chiefly dialect pantry  b. a room (as in an English college) stocking provisions for sale to students  II. adjective  Date: 14th century  1.  a. having the qualities (as smoothness or richness) of butter ~ flavors  b. containing or spread with butter ~ pastry  2. marked by flattery ~ compliments