Banana Nut Cake
["2 1/4 c. flour", "1 2/3 c. sugar", "1 1/4 tsp. baking powder", "1 tsp. salt", "1 tsp. baking soda", "1 1/2 c. (2 medium) mashed bananas", "2/3 c. buttermilk *", "2/3 c. margarine or butter, softened", "2 eggs", "2/3 c. chopped nuts"]
["*May substitute for buttermilk:", "scant 2/3 cup milk and 1 3/4 teaspoons lemon juice or vinegar stirred in.", "Let stand for 5 minutes before adding to cake."]
["flour", "sugar", "baking powder", "salt", "baking soda", "bananas", "buttermilk", "margarine", "eggs", "nuts"]