-1 tablespoon baking powder.
-150g chocolate powder.
FIRST:Mix the sugar and the eggs in a big bowl.Add the softened butter and mix well.
NEXT:Add the flour and baking powder.Mix well.Divide the mixture in two.Mix the chocolate powder with the half mixture.
THEN:Pour the chocolate mixture into a grease cake tin.Then add the rest of the mixture.
FINALLY:Cook for 40 minutes at 180º (mark 6 ).