2. Stir together sugar, flour, cocoa, baking powder, baking soda and salt in large bowl. Add eggs, milk, oil, vanilla extract beat on medium speed of mixer 2 minutes. In a measuring cup microwave 1 cup of water (or heat on stovetop). Stir in instant espresso. Add boiling water to batter. Stir to combine. (batter will be thin) to the cake batter. Fill each cupcake well about 3/4 cup full of batter.