INGREDIENTS
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Topping
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1 cup all-purpose flour
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1/2 cup packed brown sugar
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4 tablespoons butter, softened
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2 teaspoons ground cinnamon
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1/8 teaspoon salt
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Cake
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1 box yellow cake mix
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1 cup sour cream
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1/2 cup butter, melted
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4 eggs
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Glaze
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1/2 cup powdered sugar
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2 to 3 teaspoons milk
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1/4 teaspoon vanilla