This crumble is really delicious with custard
Place apple and blackberries in an ovenproof dish. Sprinkle with granulated sugar.
Place flour and butter in a food processor. Switch on ad pulsate for 5 seconds till the mixture resemble fine breadcrumbs. Add in caster sugar.
Sprinkle the crumble evenly on the prepared fruits. Bake in the oven 190C/375F/ Gas 5 for 15 minutes and then reduce the temperature to (180C/357F/ Gas4) for 45 minutes.
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