Preheat oven to 350 degree F. Line the cupcake tray with cupcake liners.
Sieve from height and mix all dry ingredients ( flour, sugar, cocoa powder, espresso powder, baking soda and salt) in a bowl.
Use liquid measuring cup to measure the liquids. Measure the milk and stir in oil. Add Vanilla extract and apple cider vinegar and stir well.
Mix liquid in the dry ingredients by a spatula till the batter is smooth and has no lumps. ** Do NOT over beat.
Scoop the batter for easy filling of cupcake liners. Fill the liners evenly – not more than ¾ full. ** Tap the pan twice gently on your work surface to get rid of any air bubbles.
Bake in pre-heated oven for about 18-20 minutes . Check by inserting a toothpick in the center of the cupcake. It should come out with few dry crumbs. Do NOT over bake
Remove it from oven. After 5 minutes, remove cupcakes on wire rack and let them cool completely.
Enjoy your delectable creation.