Put milk, eggs, melted butter, sugar, and salt in blender and process to combine. Add flour and process until smooth.
Allow crepe mixture to sit in the refrigerator for at least an hour before using.
Prepare Crepes
Heat a crêpe pan (or an 8- or 9-inch non-stick sauté pan) over medium-low heat. It is important to find the right temperature for crêpes. When done, crêpes should be very lightly golden. Start your pan on medium low and work from there.
If you are worried about your crêpes sticking, rub a little coconut oil or extra-virgin olive oil over the surface with a paper towel. Remove any visible oil before proceeding.
Pour ¼ to ⅓ cup crêpe batter into the middle of the heated pan. Immediately swirl it around to create a thin flat crepe that reaches just slightly up the sides of the pan. (I usually lift it off the burner for this step: it makes it much easier to manipulate the pan.)Cook for about 1 minute.
The crêpe is ready to flip when the edges are just beginning to turn brown and the batter in the middle is no longer glossy or wet looking.
Using a large, thin rubber spatula, loosen the edges, and then gently flip the crepe. Allow it to cook an additional 30 seconds to a minute.
If you are making another crêpe, don’t let the pan set empty on the burner for more than a few seconds or it will get too hot.
Carefully lift edge of crepe with a spatula to test for doneness. The crepe is ready to turn when it can be shaken loose from the pan and the underside is lightly browned. Turn crepe over; cook 30 seconds on other side.
Notes
Flipping CrepesI usually don't use the spatula to do the actual flipping. I flip the crepe by lifting the edges with the spatula, then I peel it up carefully with my fingers and I flip it over in one fluid motion. If you use this method, be sure to keep you fingers off the hot pan! Refrigerating Crepe BatterDO NOT SKIP the refrigeration step. Refrigerating the batter after it’s been mixed relaxes the gluten, resulting in light, airy crêpes.Refrigerating and/or Freezing Cooked Crepes
If you wish to store your crepes in the refrigerator, place a stack of cooked, cooled crepes inside a heavy-duty zip-top plastic bag.
Crepes may be refrigerated for up to a week, and can be frozen for up to two months.
To defrost frozen crepes, place them in the refrigerator.
Reheat single crepes in a hot, dry pan for a few seconds, or reheat stacks of defrosted crepes in the microwave at 15 seconds intervals.