INGREDIENTS
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2 1/2 cups all-purpose flour
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1 1/2 cups white sugar
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1 tablespoon baking powder
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1 teaspoon salt
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1 cup milk
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1/2 cup vegetable oil
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2 eggs, beaten
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2 teaspoons vanilla extract
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2 cups fresh blueberries
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2 teaspoons all-purpose flour, or as needed
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2 tablespoons butter, melted
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2 tablespoons white sugar, or more to taste