Apple Crumble

Place the flour, brown and demerara sugar in a bowl and leave in the freezer. Preheat the oven to 180C. Core, peel, and cut the apples in wedges. Grease an ovenproof dish and spread the apples in it. Sprinkle with caster sugar and cinnamon. Dice the butter and rub it in the flour mixture, using the tips of your fingers, until it resembles breadcrumbs. Cover the fruit with the crumble mixture and bake for approx. 45 min. until browned. Serve with ice cream.