"We doubt you'll have any leftovers from this homey blueberry cake crowned by a buttery, brown-sugar-sweetened streusel topping, but if you do, it will make a fabulous companion to your morning coffee...."
INGREDIENTS
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ingredients
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For streusel topping:
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1 cup all-purpose flour
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1 tablespoon plus 1 teaspoon packed dark brown sugar
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1 tablespoon plus 1 teaspoon granulated sugar
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3/4 teaspoon cinnamon
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1/2 stick cold unsalted butter, cut into 1/2-inch piecesFor cake:
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1 cup all-purpose flour
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1 teaspoon baking powder
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1/4 teaspoon baking soda
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1/2 teaspoon salt
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1/2 cup sour cream
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3/4 teaspoon pure vanilla extract
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1/2 stick unsalted butter, softened
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3/4 cup granulated sugar
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1 large egg
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1/2 pound blueberries (3 1/4 cups)
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Accompaniment: sweetened whipped cream