Banana Cake with butter

2 cups all-purpose flour 1 2/3 cups sugar 1 1/4 teaspoons baking soda 1 teaspoon salt 3/4 teaspoon baking powder 2/3 cup shortening 2/3 cup buttermilk 3 eggs[...]

2 cups all-purpose flour 1 teaspoon baking powder 1 teaspoon baking soda 1/4 teaspoon salt 1/2 cup unsalted butter , softened (1 stick) 1 1/2 cups sugar 1[...]