Melt 1 tablespoon of butter in a nonstick crepe pan over medium heat until the foam disappears. Pour about 2 tablespoons of the batter into the pan, and swirl to cover the bottom of the pan with a thin layer of batter. Cook until the crepe is no longer runny, about 1 minute; flip and cook the other side for an additional 1 minute. Repeat with additional butter and crepe mix, to make 4 crepes. Set the crepes aside on paper towels.