Mixing crepes by hand. Sift the dry ingredients into a bowl. Break the eggs into another bowl and mix until yolks and whites are blended. Make a hole in the middle of the dry ingredients and pour in beaten eggs. (French chefs often break the eggs right into the dry ingredients but this makes mixing more difficult. Stir the flour mixture into the eggs little by little. The dough will be difficult to work and it may be necessary to add a little milk (or whatever liquid is used in the particular recipe) to incorporate all the flour. Add the liquid a spoonful at a time and mix it in thoroughly before adding more liquid. When the mixture becomes easy to work (when about half of the liquid has been used) the remainder can be added in two portions. Add melted butter (and flavorings if indicated). Mix again, cover and set aside for at least an hour but not more than 6 hours at room temperature. Crepe batter can be held overnight in the refrigerater. If necessary, the crepe batter can be cooked immediately, but the "resting" time allows the flour to absorb more liquids, makes the mabber easier to handle, and gives the crepes more flavor. Since flours vary in their ability to absorb liquid, if the crepe batter seems too thick when you are ready to cook it, a small amount of extra liquid can be added at this time. The consistency could be at least as thin as heavy cream.