"Classic Blackberry Crumble is a delicious way to use those fresh summer berries and you can't go wrong when it's topped with vanilla ice cream!..."
INGREDIENTS
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butter for greasing dish
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4 cups blackberries (fresh or frozen)
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¼ cup granulated sugar
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2 tsp cornstarch
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1 tbsp water
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1 cup quick-cooking oats
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½ cup brown sugar, firmly packed
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1 tsp ground cinnamon
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½ cup flour
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½ cup cold butter, cut into small cubes