Add the milk, water, eggs, and melted butter to a blender and blend on medium speed for 30 seconds.
Next, add the flour (and any additional flavorings) and blend for 15 seconds. Scrape down the sides of the blender, if needed, and blend for an additional 15 seconds.
Heat a large, nonstick skillet (preferably one with short sides) over medium heat, just until it is warm. Grease the pan very lightly with butter or non-stick cooking spray.
Add about 3 tablespoons of batter to the center of the pan and swirl it in a circular motion to spread out the batter. It will seem difficult at first, but you’ll get the hang of it!
Cook for 2 minutes, then flip the crepe and cook for an additional minute. Remove the crepe to a plate and repeat with the remaining batter.
Fill the crepes with your favorite garnishes and enjoy them warm.
Store any leftover, unfilled crepes in an airtight container in the fridge for up to two days.