Those who know Rose Prince's cake-making will be accustomed to the boiling method that she uses for fruit and spice cakes – it ensures an edge with a lovely chewiness and a soggy inner crumb. Eat this cake with mature cheddar cheese, after a long Sunday lunch.You will need a 20cm square cake tin with a loose base, or a similar 25cm round tin. Prepare the tin by buttering it well, then lining with baking parchment and buttering it again – generously.