- Grease and paper line the base of two 20cm Round Sandwich Pans. Sift flour, cream of tartar, bicarbonate of soda, ginger and cinnamon together. Cream butter and sugar until light in colour, add eggs, sifted ingredients and sufficient milk to form a soft dropping consistency. Spoon equally into the prepared Pans. Bake in a moderately hot oven (190°C) for 20 to 30 minutes or until cooked. Leave in pans for 5 minutes before turning out on to a cake rack. Sandwich together with butter cream and top with glace icing.