Banana Bread
["1 c. butter", "1 c. sugar", "2 eggs", "4 Tbsp. sour cream or sour milk*", "1 tsp. baking soda", "1/2 tsp. salt", "1 1/2 c. crushed bananas (about 4 whole)", "1 tsp. baking powder", "1 c. chopped nuts", "3 c. flour"]
["*Sour Milk:", "Add 1/2 teaspoon vinegar to 4 tablespoons milk; let stand for 15 minutes."]
["butter", "sugar", "eggs", "sour cream", "baking soda", "salt", "bananas", "baking powder", "nuts", "flour"]