The term 'thin, crisp cookie' can be described by two crossword solutions: WAFER (5 letters) and SNAP (4 letters). Wafers are thin, flat cookies made from a batter of flour, sugar, and other ingredients. They are usually baked until they are crisp and golden brown. Snaps are also thin, crisp cookies, but they are made with a dough that is rolled out and cut into shapes before baking. Both types of cookies are popular treats and can be enjoyed plain or with a variety of toppings.