Whisk together milk, eggs, water or soda, and salt in a large mixing bowl (ideally one with a pouring edge). Add melted butter, then incorporate flour, and mix until smooth.
Heat a griddle, crepe, or flat frying pan over medium heat. Add ½ tablespoon butter or a little oil and swirl around to coat the pan. Add ¼ cup batter into the center of the pan and tilt pan in a circular motion so that the batter creates a thin, even circle.
Cook for 1 to 2 minutes until crepe is no longer wet and bottom is light brown. Work a spatula under the edge and quickly flip crepe and cook an additional minute or so until the other side has colored. Remove from pan, roll with apple butter, or desired filling, and serve.
