turn on the oven to 200c.
melt the butter in a pot, then add the chocolate to the pot and stir until it has a uniform consistency. do the next step while the butter is melting.
whip the eggs and sugar into a white foam.
mix the melted choco-butter into the egg-sugar foam.
mix the flour and baking powder together, then add and mix carefully with the rest.
line a cake pan with parchment paper. coat the lined cake pan with butter. pour the mixture into the pan.
bake for 11-12 minutes in the middle of the oven. do not overcook! it should jiggle when fresh out of the oven. let it rest at least overnight before consuming.