What Are Crêpes Made Of? Crêpes are easy to make with basic ingredients you likely already have on hand: Flour: These basic French crêpes start with a cup of all-purpose flour. Eggs: Eggs act as a binder, which means they help hold the batter together. Milk: Milk adds moisture and keeps the crêpes tender. Water: Water helps thin the batter. Salt: A pinch of salt enhances the overall flavor. Butter: Butter lends richness and moisture to the crêpes.