First Get out your ingredients and Preheat the oven to 190 degrees or gas mark 5. Next Sift the flour into a mixing bowl and Add the sugar and margarine. Third Crack the eggs and put them in the bowl and Mix everything together. Next Add in chocolate chips and vanilla essence. that Place 12 cupcake liners into a cupcake pan and Divide the cupcake mixture evenly in the cupcake . Finally Place them in the oven to bake for 10-15 minutes When done place cupcakes onto a cooling rack.