Always preheat your oven and have your bake ware prepared... 180°c

Place the magarine in a bowl and beat till smooth

Stir in sugar and vanilla extract till thick and smooth

Add one egg at a time while whisking

Sift the flour and add to the mixture and incorporate well

Scoop more than half the batter amd put it in your prepared tin

To the rest of the batter, add the cocoa powder and mix well

Add the cocoa batter on top of the plain batter and swirl gently using a spoon to make your own marble effect

Bake for about 25 minutes