I always struggled to get my children to eat fruit and veg when they were small. But these bite-sized cakes are packed full of goodness and iced with a delicious cream cheese frosting in a rainbow of colours. I used natural food colours which are now available in some supermarkets, containing beetroot, paprika, turmeric, tomatoes and grape skins (even algae). One word of caution: don’t make the colours too strong as you may then be able to detect some of those flavours! If you would like more than one flavour of cake, make up one cake mix, divide it into two or three, and add 150 g each of two different fruit or vegetables, or 100 g each of three.