Heat a crêpe pan (non-stick recommended), grease it with some butter, and pour some batter while rolling the pan to make the crêpe as thin as possible (8 finished crepe might add up to a stack 1/4" or 6mm thick). A drop of water can be used to test the pan temperature: too cold, and the water will sit on the pan, too hot and it will vanish immediately. At the right temperature, the water will seem to "dance" on the pan.