Banana Bars
["2/3 c. margarine", "1 1/2 c. sugar", "2 eggs", "1 c. bananas, mashed", "1 tsp. soda", "1 1/2 c. flour", "1/4 c. sour milk (milk plus 1/2 tsp. vinegar)", "1/2 tsp. vanilla", "1/2 c. chopped nuts (optional)"]
["Combine all ingredients and pour into 9 x 13 pan.", "Bake at 325\u00b0 for 35 minutes."]
["margarine", "sugar", "eggs", "bananas", "soda", "flour", "sour milk", "vanilla", "nuts"]