This Double Shape Cake's got two tone circles on the outside... ...and two tone squares on the inside. To make the Double Shape Cake, you'll need 200g butter, 200g caster sugar, 200g self raising flour and 4 eggs. In a bowl, cream together the butter and caster sugar. Then into the butter and sugar, mix 4 lightly beaten eggs and the flour. Give it all a good mix until it looks like this! Divide the mixture equally into two. This will be for the two different cake colours. Choose any colours you like. Use a teaspoon of food colouring paste - this will give the cake a good strong colour. You can buy food colouring paste in any catering or cake decorating shop. Mix it well so that the colour spreads evenly. Next, grease and flour two 20cm cake tins. Do this by wiping some butter around them and then sprinkling some flour into them. Dollop the mixture into the tins. Cook the cakes at 180c or Gas Mark 4 for about 20 minutes - until they're springy to the touch! Once the cakes are cooked and cooled down you can cut out the circles. To make the circles, the best things to use are different size pastry cutters. If you don't have any pastry cutters, you can make some card circle templates. Simply put a template onto the cake and cut round. The first cutter Stephen used is 15cm wide. Put it on the cake and make sure there's an even space all the way around the cutter and the edge of the cake. Then cut the cake with a smaller circle - this one is 10cm. Use a final cutter of 5cm to cut a small circle in the middle. Then do the exact same on the other cake. Slot the circles of cake together like this... ...alternating the colours as you go. Spread some butter icing made from butter and icing sugar over one layer of the cake. You could use jam if you want to. Then carefully sandwich the other cake on top. Use your favourite colours to make the cake. Enjoy!