Blend the milk, eggs, flour, sugar, vanilla, food coloring, and salt until smooth, about 30 seconds. It will look like thin pancake batter!If you don't have a blender, whisk everything together until the batter is smooth and lump-free. Pour the batter into a mixing bowl or container, then quickly whisk in the melted butter.
Cover the bowl and chill in the fridge for at least 1 hour, overnight is best!
When ready to cook, take the batter out of the fridge and give it a good whisk. Then lightly butter a nonstick skillet and place it over medium-low heat.
Add a little less than ¼ cup of the batter to the pan and swirl it in a circular motion so that it completely covers the bottom of the pan. Don’t swirl it too much where it goes up the sides of the pan. Cook for 1 minute, then use a rubber spatula to loosen the edge of the crepe closest to you. Pick it up carefully with your fingers or use the spatula and flip it over. Cook for 30 seconds longer.
Transfer the crepe to a plate and continue cooking until all of the batter is gone. You should have roughly 20-25 crepes. Set them aside to cool completely before using.