Heat oven to 350℉/177℃.
Line cupcake tins with paper liners, or spray with baking spray. Set aside.
In a large bowl, whisk together flour, sugar, cocoa, espresso powder, baking powder, baking soda, and salt. Set aside.
In a medium bowl, whisk together eggs, milk, oil, and vanilla.
Pour wet ingredients over dry ingredients.
Stir until combined.
Use a 3 Tablespoon scoop to portion batter into prepared pans.
Bake for 25-30 minutes, or until cupcakes test done.