"This Blueberry Buckle is an old-fashioned single layer cake, with a tender crumb, juicy sweet blueberries, and a crisp streusel topping...."
INGREDIENTS
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1/3 cup all-purpose flour
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1/4 cup granulated sugar
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1/4 cup brown sugar
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1/4 cup cold butter (, cut into small cubes)
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1/2 teaspoon ground cinnamon
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3/4 cup granulated sugar
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2 tablespoons shortening
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2 tablespoons butter (, softened)
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1 egg
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2 teaspoons lemon zest
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1/2 teaspoon vanilla
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1 3/4 cups all-purpose flour (, spooned and leveled)
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2 teaspoons baking powder
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1/2 teaspoon kosher salt
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1/2 cup whole milk
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1 3/4 cups blueberries ((fresh or frozen, see note))