To Die For Blueberry Muffins
Ingredients:
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1 ½ cups all-purpose flour
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¾ cup white sugar
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½ teaspoon salt
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2 teaspoons baking powder
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⅓ cup vegetable oil
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1 egg
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⅓ cup milk, or more as needed
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1 cup fresh blueberries
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½ cup white sugar
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⅓ cup all-purpose flour
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¼ cup butter, cubed
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1 ½ teaspoons ground cinnamon