Pre-heat oven to 180C/Gas Mark 3. Grease and line 2 sphere tins with greaseproof paper. 

In a large bowl, combine all the ingredients together and whisk until well combined. 

Split the mixture evenly into 4 bowls. 

Choose different colours for each bowl. I used Walton cake colours from Lakeland. 

Place the colours evenly into the sphere tins. 

Bake for 35 mins. 

Once cool, remove cakes from tin. Cut the edge of one of the cakes so it has a flat base. 

Buttercream the cakes and stick together. Buttercream the outer layer of the cake completely covering it. 

Place the ready rolled icing over the top and smooth around, use a knife to remove any extra bits you don't need. 

Add decorations and stick on using edible glue. I made flowers, butterflies and leaves, but you can buy them as well.