Chocolate and Vanilla Marble Loaf

Not sure whether to make a chocolate cake or a vanilla cake? Why not combine both and make this chocolate and vanilla marble loaf topped with a chocolate fudge icing. What you'll need: 175g soft margarine 175g caster sugar 200g self-rasing flour 1 tsp baking powder 3 eggs 2 tbsp milk 1/2 tsp vanilla extract…