Sour Cream Coffee Cake
["1/2 c. finely chopped walnuts", "1 tsp. ground cinnamon", "1 1/2 c. sugar", "2 1/4 c. unsifted all-purpose flour", "2 tsp. baking powder", "1/2 tsp. baking soda", "1/4 tsp. salt", "1/3 c. butter, softened", "1/3 c. vegetable oil", "2 large eggs", "1 c. light or nonfat sour cream", "2 tsp. vanilla extract"]
["In a small bowl, combine walnuts, cinnamon and 1/2 cup of sugar until well mixed.", "Set aside."]
["walnuts", "ground cinnamon", "sugar", "flour", "baking powder", "baking soda", "salt", "butter", "vegetable oil", "eggs", "cream", "vanilla extract"]