Add the eggs, water, milk, flour, cocoa powder, sugar, salt, and vanilla to a blender and process until smooth. Add the butter and blend again for a few seconds. Let the batter rest for 15 minutes.
Preheat crepe pan. Pour 1/3 cup of batter into pan and swirl. Cook for about 1 minute on medium heat until the surface of the crepe looks dry, then flip and cook for another 15-30 seconds, then transfer to a plate. Repeat with remaining batter, stacking the crepes on top of each other.
Fill however you like!
TIPS FOR CHOCOLATE CREPES A nice, smooth batter will result in thinner, better crepes. It should be pourable and easy to swirl around the bottom of a hot crepe pan or skillet. Make sure your pan is nice and hot. Crepes should cook quickly, only about a minute on the first side and less than 30 seconds on the other side. Which is good since somebody has to stand by the stove flipping them and building that stack of crepes before everybody can eat! Don’t add too much batter to the pan. You want just enough chocolate crepe batter so that it covers the bottom of the pan completely before the bottom cooks. Pour about 1/3 cup of batter onto one side of a hot pan and swirl it, holding the pan up and letting gravity do it’s job to allow the thin batter to flow around the pan quickly before it cooks. No worries if the first few crepes are flops. It takes some time to figure out the technique and to get the pan to just the right temperature. But even ugly crepes are just as tasty! Use a crepe turner (a thin wooden spatula) to flip the crepes if you have one. Or a rubber spatula or butter knife will work as well. Like my chocolate pastry crust, there isn’t an intense hit of chocolate in these crepes. It’s subtle, but still noticeable and makes these deliciously different from the norm. If you want a bigger chocolate flavor, you will need to boost that by filling these with nutella or drizzling them with chocolate sauce.