Step 1
Start by combining the flour, brown sugar, cocoa powder, and hot cocoa mix right in a large microwave-safe mug. Crack the egg into the mug and give everything a good stir to blend it all together. Next, pour in the chocolate milk and vegetable oil, mixing until the batter is smooth and lump-free. Toss in the chocolate chips and a splash of vanilla extract, then stir once more to spread everything evenly. Pop the mug into the microwave and cook on high for about 3 minutes, or until the cake has puffed up a bit and a toothpick comes out clean when you test it in the center. Let it cool for a minute or two before digging in!



