Preheat griddle or skillet to medium heat.
In a large bowl, stir together the dry ingredients (flour, cocoa powder, baking powder, baking soda, salt, and granulated sugar.)
In a separate bowl, combine the wet ingredients (milk, egg, vanilla, and cooled melted butter.)
Add the wet ingredients (milk, egg, vanilla, and cooled melted butter) to the dry ingredients (flour mixture), and stir until it is combined and the large lumps are gone.
When the skillet is hot, either rub the griddle or skillet with butter, or add oil or spray with cooking spray.
Ladle about 1/4 - 1/3 cup of chocolate pancake batter onto the hot griddle or skillet. Let it cook for a couple of minutes until you see bubbles and the bubbles in the middle start to pop.
When the bubbles start to pop, use a spatula to carefully turn the pancake. Cook the pancake on the other side for about 1 - 2 more minutes.
Use a spatula to remove the pancake and place on a plate or serving dish.
Repeat steps 5 - 8 with the rest of the pancake batter.
Top with powdered sugar, sliced strawberries, chocolate chips, or marshmallows.