Sour Cream Blueberry Muffins
Ingredients:
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cooking spray
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½ cup all-purpose flour
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¼ cup brown sugar
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½ teaspoon ground cinnamon
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¼ teaspoon salt
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¼ cup butter, softened
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2 cups all-purpose flour
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3 teaspoons baking powder
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1 teaspoon cinnamon
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¼ teaspoon salt
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2 large eggs
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½ cup granulated sugar
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½ cup brown sugar
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1 cup sour cream
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½ cup vegetable oil
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1 teaspoon vanilla extract
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2 cups blueberries
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1 tablespoon all-purpose flour