Put flour, baking powder, salt, sugar, margarine, eggs, vanilla drops, and the milk into the mixing bowl.

Preheat oven 175 degrees

Grease round baking tin

Mix all together until smooth

Out of the mixture put 3 quarters of a cup aside and pour the rest into the baking tin.

Stir the co co powder into the 3 quarters of a cup mixture which was put aside

Then swirl the cocoa mixture into the tin with the rest of the mixture, bit by bit and swirl it around to make a marble effect.

Bake for 30 mins