mix the eggs and sugar in hi speed for about 10 minutes or until it is well mixed

in a separated bowl: melt the butter and chocolate (be careful dont be over heated) you can melt in a microwave for 2 minutes or steam

after cooling down the choc mixture for a while...mix it well with the first mixture (eggs n sugar) use spatula/ whisk

combine the dry ingredients (flour,salt,baking powder) and put it into the mixture.

add vanilla extract

add the filling into the dough and mix well

prepare the tray 25x12x4 or any baking tray size you want.

preheat the oven to 180 C and bake for about 45 minutes