Sour Cream Coffee Cake
["1/2 c. walnuts or pecans, finely chopped", "1 tsp. cinnamon", "1/2 c. sugar", "1/2 c. margarine", "1 c. sugar", "2 eggs", "2 c. plain flour", "1 tsp. baking powder", "1 tsp. baking soda", "8 oz. sour cream", "1 tsp. vanilla"]
["Mix first 3 ingredients together and set aside."]
["walnuts", "cinnamon", "sugar", "margarine", "sugar", "eggs", "flour", "baking powder", "baking soda", "sour cream", "vanilla"]