Preheat oven to 350 degrees F. Place cupcake papers in the cupcake pan.
In a large bowl, whisk together dry ingredients including sugar, flower, cocoa powder, baking powder, baking soda, and salt.
Add eggs, milk, oil, vanilla extract, and instant coffee packet and beat well with mixer (or by hand).
Carefully stir in hot coffee (do not burn yourself). Batter will be very thin.
Using a measuring cup with a lip, fill each cupcake only HALF full (it may boil over if you fill it more).
Bake 20-28min (check at 20 and add 2-3min each session until a wooden toothpick inserted in the center comes out clean.
Rest for five minutes and place cupcakes on cooling rack. Prepare frosting.