"In ‘Tate’s Bakeshop Cookbook’ by Kathleen King..."
INGREDIENTS
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3 1/4 cups all-purpose flour
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1 teaspoon baking soda
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1 teaspoon baking powder
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1/4 teaspoon salt
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3/4 cup salted butter, room temperature
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2 cups sugar
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1 tablespoon vanilla
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1 large egg
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1 cup sour cream