1: Preheat the oven to 350F.
2: In a small baking dish, add the egg, milk, sugar, and vanilla. Mix until well combined.
3: Add the flour and cocoa powder. Mix until well combined.
4: Bake for 25 minutes or until you insert a toothpick and soft crumbs come out.
5: Top with icing and sprinkles and enjoy!
