Mix coffee powder in hot water, keep aside.

Preheat the oven to 170 degrees C. Lightly grease an 8-inch round cake pan with oil and place a piece of baking paper at the bottom of the pan.

In a large bowl mix all-purpose flour, baking soda, baking powder, cocoa powder, and sugar. Add and mix all the wet ingredients including the coffee mixture in a separate bowl. Now pour this wet mixture into the dry ingredients. Whisk well until lump-free batter forms, care should be taken not to whisk it for a longer time.

Pour the batter into the prepared pan. Tap the cake pan gently on the kitchen counter a couple of times to release the air bubbles. Bake for 30 minutes. Insert a toothpick in the middle of the cake, the cake is ready if the toothpick comes out clean or with a few moist crumbs. 

Cool the cake in the pan for 10 minutes and then run a sharp knife around the edges of the pan and carefully remove the cake. Turn onto a cooling rack and leave there until completely cooled.

When cooled, slice, serve, and enjoy!