Old-Fashioned Rhubarb Cake
["1/2 c. butter or margarine", "1 c. sugar", "1 egg", "1 c. buttermilk", "1 tsp. vanilla", "2 c. flour", "1 tsp. soda", "1/2 tsp. salt", "2 c. chopped rhubarb"]
["Cream margarine and sugar.", "Add egg.", "Beat well.", "Combine buttermilk and vanilla; set aside.", "Combine dry ingredients.", "Add alternately with buttermilk to creamed mixture.", "Stir in rhubarb. Spread into a greased 13 x 9 x 2-inch baking pan.", "Combine 1/4 cup sugar and 1/2 teaspoon cinnamon; sprinkle over batter.", "Bake at 350\u00b0 for 30 minutes or until done."]
["butter", "sugar", "egg", "buttermilk", "vanilla", "flour", "soda", "salt", "rhubarb"]