"Fluffy, buttery Blueberry Coffee Cake with Streusel Topping. Bursting with fresh berries, perfectly moist & perfect for spring!..."
INGREDIENTS
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1 cup all-purpose flour
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1/2 cup granulated sugar
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1/3 cup packed brown sugar
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1 and 1/2 teaspoons cinnamon
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1/2 cup unsalted butter (, melted)
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1 and 1/2 cups all-purpose flour (, spooned & leveled)
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2 teaspoons baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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6 tablespoons unsalted butter (, very soft)
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3/4 cup granulated sugar
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2 large eggs*
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2 teaspoons vanilla extract
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1/3 cup sour cream*
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1/3 cup buttermilk**
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1 and 1/4 cup fresh blueberries (, if using frozen berries do not thaw first)
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2 teaspoons flour
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1 cup powdered sugar
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1-2 tablespoons milk