Cost (prices taken from MySupermarket.co.uk) 1kg sweet potatoes | 96p 100g ground almonds | 99p 150g fine cornmeal | 25p 300g plain flour | 9p 100g desiccated coconut | 50p 3 eggs | 62p 10g crystalised ginger | 11p 350g soft brown sugar | 87p 2 egg yolks, beaten | 41p 350g soft brown sugar | 87p £4.80 in total / 9-12p each