Nigella Lawson's 'crumble of dreams' needs one 'obligatory' treat with itNigella Lawson has shared her luxurious apple crumble recipe that is always going to go down a treat - and said one component is 'obligatory' rather than optionalView 2 Images Nigella Lawson has shared her favourite apple crumble recipe (Image: Toronto Star via Getty Images)As the colder months arrive, sometimes there's nothing nicer than indulging in a hearty warm dessert - and Nigella Lawson has shared her ultimate 'crumble of dreams'. She also said the unbaked crumble can be frozen, wrapped in a double layer of cling film and aluminium foil, for up to 3 months. Put the hulled strawberries into your pie dish (I use a round one) and sprinkle over the sugar, almonds and vanilla extract. Now for the crumble topping: put the flour and baking powder in a mixing bowl and rub in the cold, diced butter between thumb and fingers (or in a freestanding mixer or food processor). Leave to stand for 10 minutes before serving, and be sure to put a jug of chilled double cream on the table alongside.