'Apple crumble is a serious business in my home,' says James Rich, author of this irresistible recipe from his cookbook Apple: Recipes from the Orchard. 'I must admit that I got slightly obsessed with creating the perfect apple crumble recipe when I was younger – testing different apple varieties, alternative ways of cooking the crumble as well as the different spices and ingredient additions you can make.' Thanks to James' rigorous testing, the rest of us can now enjoy perfect apple crumble whenever we fancy. Which apples are best for apple crumble? ‘Firstly, to my mind there is only one apple variety that anybody should consider for a crumble recipe.