This impressive rainbow cake is the perfect celebration and party
centrepiece. It’s deceptively simple to make too – all you need is basic
cake ingredients and a rainbow of food colouring! You will need 6 x
20cm/8in loose bottom sandwich cake tins (approximately 4cm/1½in deep), a
20cm/8in and a 30cm/12in cake board, 2 non-slip cake mats trimmed to about
18cm/7in and 25cm/10in diameter, a turntable, a cake side scraper and 6
medium-sized piping bags.
full recipe on bbc food.