step 1
Preheat the oven to 190oC/Gas mark 5 and grease a baking tray.
step 2
Cream together the margarine and the sugar until light and fluffy. Stir in the flour and the cocoa to form a dough like ball, then add the vanilla essence.
step 3
Roll the mixture into marble sized balls and place on the baking tray before flattening with a cold fork. Then place in the oven to bake for about 9 minutes.
step 4
When they are removed from the oven leave them on the tray for roughly 5 minutes before placing on a cooling rack.
step 5
Optional: for the filling you mix the butter and the sugar then add the rest of ingredients. When the biscuits have cooled you can use this to sandwich them.