The Ultimate Berry Crumble
Ingredients:
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2 cups all-purpose flour
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¼ teaspoon fine salt
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¾ teaspoon baking powder
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¾ cup white sugar
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¾ cup frozen unsalted butter
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1 ½ teaspoons vanilla extract
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2 large egg yolks
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1 teaspoon apple cider vinegar, or as needed
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1 cup blueberries
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1 cup raspberries
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1 cup blackberries
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1 teaspoon lemon zest
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2 teaspoons fresh lemon juice
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⅓ cup white sugar
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2 teaspoons cornstarch
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1 pinch cayenne pepper