I think your brother Aitishnik has no time to cook especially and go to the store if he suddenly wants something delicious. Therefore, I offer a recipe for a round cake. It is prepared for 5-6 minutes. You will need a simple cup and a microwave.
What is needed:

4 tablespoons of flour
4 st. L. the sugar
2 st. L. the cacao
1 egg
Three st. L. the milk
Three st. L. vegetable oil
The Vanilla

What to do:

Add the dry ingredients to a cup, mix with a fork. Add the egg and mix again. Pour milk, butter, vanilla, make a thorough final mixture, add a chocolate crunch (if desired). Now safely put the cup in the microwave for 4 minutes, at the power - 1000 watts. Don’t worry if the cake will rise above the cup – it’s okay. Ready cake to pour crème / syrup / decorate with cherries or just eat directly from the cup.