INGREDIENTS
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1 1/2 lb. frozen blueberries (1/2 package), about 4 1/2 cups
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1/4 cup(s) granulated sugar
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3 Tbsp. all-purpose flour, divided
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1/3 cup(s) brown sugar
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1/3 cup(s) quick-cook oats
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3 Tbsp. unsalted butter, softened
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1/4 tsp. ground cinnamon
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1/8 tsp. salt