Super Sour Cream Banana Bar Cake
["3 mashed bananas", "1/2 c. butter", "1 c. sour cream", "2 tsp. vanilla", "2 eggs", "1 1/2 c. sugar or to taste", "3 c. flour (some prefer only 2)", "1 tsp. baking powder", "1/2 tsp. salt", "3 c. powdered sugar", "3 Tbsp. butter", "1 tsp. vanilla", "1 Tbsp. milk", "1/2 c. chopped walnuts or pecans"]
["Mix together the first 9 ingredients and bake for 25 to 30 minutes at 350\u00b0", "in a greased and floured jelly roll pan (with sides).", "When cake is almost cool, mix together the last 5 ingredients and spread over the banana bar cake.", "Great!"]
["bananas", "butter", "sour cream", "vanilla", "eggs", "sugar", "flour", "baking powder", "salt", "powdered sugar", "butter", "vanilla", "milk", "walnuts"]