In a medium-sized bowl, whisk flour, cocoa powder, sugar, baking powder, baking soda and salt.
In a separate bowl, whisk egg, buttermilk, melted butter and vanilla.
Make a well in the center of the dry ingredients. Add the buttermilk mixture and stir. Small lumps left in the batter are ok.
Preheat griddle or frying pan over medium-low heat. Place a dot of vegetable oil on a paper towel and run it over your cook surface.
Drop batter by 1/4 cupfuls. Cook until sides are dry and tiny bubbles pop on the top. Carefully flip. Cook about 1 minute more.
Remove to plate to serve.
Store tightly covered in fridge for 1-2 days, or freeze for 1-2 months.
Notes
To make sour milk: Add 1 Tablespoon lemon juice (or vinegar) to a liquid measuring cup. Add milk up the the 8 ounce line. Stir. Let sit 5-10 minutes before using.
You can swap out vegetable oil for the melted butter.
Serving options:
Butter and powdered sugar
Butter and syrup for traditional pancakes
Whipped cream for a true hot chocolate finish
Plain for a less-mess option
To store: Place in storage baggie, Tupperware, or wrap in aluminum foil. For easy separation, place a piece of waxed paper between each pancake.