A croissant is crescent shaped roll made with yeast-risen dough. The dough is typically layered with butter, then rolled, and folded several times in a process called lamination. The final dough is cut into triangles and rolled into a crescent shape.The process of lamination results in a layered, flaky textured roll, more like puff pastry. The main ingredients in a croissant are flour, yeast, salt, sugar, milk, water, eggs and butter. A well baked croissant should be flaky and crisp on the outside and tender and moist on the inside. It should be evenly baked and well aerated.