"Skip the bakery and make this buttery rich old-fashioned sour cream crumb cake at home!..."
INGREDIENTS
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1/3 cup (67g) packed dark or light brown sugar
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1/2 (62g) cup all-purpose flour
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1 and 1/2 teaspoons ground cinnamon
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3 Tablespoons (43g) unsalted butter, cold and cubed
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1 and 1/3 cups (166g) all-purpose flour (spoon & leveled)
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1 teaspoon baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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1/2 cup (115g) unsalted butter, softened to room temperature
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3/4 cup (150g) granulated sugar
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2 large eggs, at room temperature
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2 teaspoons pure vanilla extract
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1/2 cup (120ml) full-fat sour cream, at room temperature*
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1/2 cup (60g) confectioners' sugar, sifted
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1/2 teaspoon pure vanilla extract
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2 Tablespoons (30ml) heavy cream or milk