Preheat oven to 350F.
Prepare two muffin tins with 15 cupcake liners.
In a large bowl, toss together the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
Make a well in the center of the dry mixture. Add in the milk, vegetable oil, egg, vanilla and coffee. Whisk all together until smooth.
Divide the batter evenly into the 15 cupcake liners. It will fill just a little over half full. Place the baking pans in the oven, reduce the heat to 325F and bake for 18-20 minutes or until a toothpick inserted into the center comes out clean.
Let cool completely before frosting.