If batter has separated, stir before using. Heat 6- to 7-inch or 9- to 10-inch skillet over medium-high heat. Wipe skillet with additional butter. To make crepe in small skillet, pour 3 tablespoons batter into pan (if using large skillet, use 1/4 cup batter). Immediately tilt and rotate skillet to spread batter over bottom surface. Cook until top surface is dry. Loosen edge with spatula; flip crepe over using fingers. Cook other side about 15 seconds. Turn crepe out of skillet onto clean kitchen towel to cool. Repeat with remaining batter, wiping skillet with butter as needed and stacking crepes as fried.