The following recipe is made with an electric blender, because it is so quick. If you do not have one, gradually blend the egg yolks into the flour with a wooded spoon, beat in the liquids by droplets, then strain through a fine sieve. Crêpe batter should be made at least 2 hours before it is to be used; this allows the flour particles to expand in the liquid and insures a tender, light, thin crêpe.
The first crêpe is a trial one to test out the consistency of your batter, the exact amount you need for the pan, and the heat.