Chocolate & Orange Mousse Cake

With a dark chocolate sponge sandwiched together with light creamy orange mousse, this spectacular cake is irresistible and delicious Ingredients: 175 g/6 oz/3/4 cup vegan butter 175 g/6 oz/2/3 cup castor (superfine) sugar 4 vegan eggs, lightly beaten 200 g/7 oz/1 ¾ cups self-raising flour 1 tbsp cocoa powder 50 g/1 ¾ oz dark vegan