Preheat the oven to 400F.

Mix the butter and sugar properly.

Add the eggs and whisk until it's mixed properly.

Sift in the flour, cocoa powder, espresso, baking powder, baking soda and whisk until it forms a smooth batter.

Lastly, add the melted dark chocolate and milk and give one final whisk.

Pour the mixture into the muffin baking pan and let it bake for about 15 to 20 minutes.

Poke the cakes with a chopstick or toothpick and if it comes out clean, the cupcakes are ready.

Let it cool in the rack for 5 minutes before you start decorating.

I am not a big fan of frosting on my cakes but today, I wanted to decorate the cupcakes just a little. So, I used some whipped cream as frosting.