Stir sugar, cocoa powder, butter, and 7 tablespoons milk together in a saucepan; bring to a boil. Cook, stirring constantly, at a boil for 2 minutes. Remove immediately and put saucepan in a sink with 1 inch cold water in it to cool the frosting. Add remaining milk and vanilla extract to the frosting; stir until thick.
Tips & Tricks
Chef John’s Christmas Miracle Fudge
See how to make rich, amazing fudge with no dairy.
Two Tone Fudge
See how to make tasty fudge with swirls of white chips and bittersweet chocolate.