Taken from Nigella's Website:
LINK, Which I haven't tried... YetIngredients
FILLING:
Three large "sharp" flavoured Bramley apples
1½ oz butter
12 oz full and ripe blackberries, if in season one can use hedgerow fruit, if the summer has not been too dry!
5 oz caster sugar
Pinch of cinnamon or cloves
2 oz cold water
CRUMBLE:
4 oz unsalted butter, diced
8 oz plain flour
4 oz caster sugar
A small quantity of brown sugar
Icing sugar to dust
Method
Serves: This makes enough for a 10 inc
1.First, freeze the butter for around 3 hours, then dice into cubes about ¼-inch in size.
2.Peel, core and dice the apples into pieces around ½-inch cubes, and place into the fridge.
3. Now add the 2 oz of water to a saucepan, add butter and the heat until melted; then add the apple chunks and gently saute, add cloves, if using sugar and the pinch of cinnamon, continuing stirring until apples are soft but not too splishy, add the blackberries to the apples and stir very gently.
4.Remove from heat after about three minutes. I personally like my fruit crunchy and tend to prepare this dish slightly undercooked, although this is a matter of personal choice! Should you like your fruit filling soft and squashy, then that is your perogative. Of course, the fruit will further soften-up as one cooks the crumble topping.
5. To make the topping, thoroughly mix the flour and sugar, then place the chilled-diced butter into the mix and allow to come up to room temperature, then using a knife, cut the butter into the mixture until very crumbly. Use a normal-temperature kitchen to do this task, the crumble needs to very fine, similar to breadcrumbs.. Spoon the fruit into a shallow round or oval oven-proof dish.
6.Sprinkle crumble mixture over the top of fruit until fruit is covered. Dust over with a very little amount of brown sugar. Place in preheated oven and cook on centre shelf for 15-30 minutes or until the crumble is a light golden brown.
7. Dust off the top with icing sugar. Serve with fresh dairy cream or creamy custard.
_________________John Vella BSc (Hons), PGCE - Still the official forum prankster and crude remarker

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