Crepes

Place the milk, eggs, sugar, vanilla, and salt into a blender. Whiz for 5 to 10 seconds to blend until smooth. Remove the lid, add the flour, cover, and blend again until completely smooth, about 30 seconds. Remove the lid, pour in the melted butter, cover, and blend until combined, about 10 seconds more. Transfer the batter to a bowl or separate container and let it rest in the refrigerator for at least 30 minutes or up to 24 hours.

Heat a crepe pan or 8 to 10-inch nonstick skillet (see note) over medium heat. Grease the pan lightly and evenly with butter. Pour about ¼ cup of crepe batter into the center of the pan (you can use a ¼-cup dry measuring cup to "ladle" the batter into the pan). Immediately lift the pan off the heat and swirl the batter so that it forms a thin, even circle on the bottom of the pan. Cook for about 1 minute, until the top is set, the edges are dry, and the crepe is golden on the bottom. Lift the crepe with an offset spatula or butter knife, taking care not to scratch the pan with the utensil, and flip with your fingertips; cook the other side for about 20 seconds, or until slightly golden and spotted. Transfer the cooked crepe to a plate. Repeat with the remaining batter, greasing the pan with a bit of butter each time and adjusting the heat as necessary. Place the cooked crepes in a stack on the plate. Cover with plastic wrap until ready to serve. (Note that the first crepe is rarely perfect; it "seasons" the pan so the remaining crepes are easy to cook, and it also tells you if the pan's temperature is right.)

To serve: Warm the crepes using one of the methods below and fill with your favorite fillings. Roll the crepes or fold in half or into quarters, and top with your favorite toppings.