105g chocolate powder
First, mix the sugar and the eggs in a big bowl.Add the softened butter and mix well.
Second, add the flour and bakin powder. Mix well. Divide the mixture in two. Mix the chocolate powder with half the mixture.
Then,pour the chocolate mixture into a greased cake tin. Then add the rest of the mixture.
Fainally, cook for 40minutes at 108º
A LITTLE EXTRA
Melt 1000g of dark chocolate with a little butter. Pour it over the cake and leave it to harden.