In a bowl, combine the flour with cocoa powder, baking powder, and sugar.
Add eggs, milk, and vanilla. Whisk until everything is well incorporated and no more lumps left.
Heat a griddle over medium heat. Grease with butter or oil. Pour around 1/4 cup batter onto the hot griddle and cook each pancake for 2 minutes, or until small bubbles pop and form holes that stay open on the surface of your pancakes. Flip and cook for another 1 minute. Repeat with the rest of the batter.