INGREDIENTS
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1 yellow butter cake mix,
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1/2 cup canola or vegetable oil
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1/2 cup sour cream
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3 eggs
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1 small package vanilla instant pudding mix
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1/2 cup all-purpose flour
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1/2 cup light packed brown sugar
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1/2 teaspoon ground cinnamon
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1/4 teaspoon kosher salt
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4 tablespoons (1/2 stick) unsalted butter, cold