a la Mark Bittman and How To Cook Everything Vegetarian
1 cup all-purpose flour
1 tablespoon sugar (optional)
1 1/4 cups milk, plus more if needed
2 tablespoons butter, melted and cooled, plus more for cooking
1. Whisk together all the ingredients except the butter for cooking until smooth; you can do this in a blender. If the mixture isn’t quite pourable, add a little more milk. If the time allows, let the batter rest in the refrigerator for an hour or up to 24 hours.
2. Put an 8 or 10 inch nonstick skillet over medium heat and wait a couple of minutes; add a small pat of butter. Stir the batter and use a large spoon or ladle to pour a couple of tablespoons of the batter into the skillet. Swirl it around so that it forms a thin layer on the bottom of the pan.
3. When the top of the crêpe is dry, after about a minute, turn and cook the other side for 15 to 30 seconds. (The crêpe should brown only very slightly and not become crisp at all.) Bear in mind that the first crêpe almost never works, even for professionals, so discard it if necessary, there is plenty of batter.
4. Stack the crêpes on a plate as you make them, and keep them warm in a low oven while you make the remaining crêpes. Even better, fill each crêpe while it’s still in the pan, putting the filling in the center of the bottom third of the crêpe. If you want your filling warmed, keep the pan over low heat for a few minutes. Either roll the crêpe starting at the end with the filling or fold the bottom third over the filling, fold in the sides, then fold the crêpe from the bottom up. Slide it onto a plate and serve. Repeat the process, adding butter to the skillet and adjusting the heat as needed, until all the batter is used up.