Victoria sandwich cake

• 4 oz (100 g) self-raising flour
• 1 level teaspoon baking powder

Heat the oven to 350°F (180°C) or gas no. 4. Grease two 7 inch sandwich cake tins and line the bases with greased greaseproof paper. Sift the flour, baking powder and salt into a mixing bowl. Add the sugar, soft creaming margarine, eggs and vanilla essence. Mix together with a wooden spoon, then beat w