Sour Cream Coffee Cake
["1/2 c. walnuts, finely chopped", "1 tsp. cinnamon", "sugar", "1/2 c. butter, softened", "2 c. flour", "1 tsp. baking powder", "1 tsp. baking soda", "1 tsp. vanilla", "2 eggs", "8 oz. sour cream"]
["In small bowl, combine walnuts, cinnamon and 1/2 cup sugar; set aside.", "Preheat oven to 350\u00b0.", "Grease 9-inch tube pan with removable sides."]
["walnuts", "cinnamon", "sugar", "butter", "flour", "baking powder", "baking soda", "vanilla", "eggs", "sour cream"]