moist banana cake

Ingredients

• - 1 c oil
• 2 - eggs
• 2 cups sugar
• 1 1/4 cups banana (3) -- mashed
• 1 cup buttermilk
• 3 cups flour
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 1 1/2 teaspoons salt
• 1 teaspoon vanilla extract
• FROSTING FOR BANANA CAKE
• 6 ounces cream cheese
• 6 tablespoons butter, room temperature
• - pinch of salt
• 1 teaspoon vanilla extract
• 2 cups 2 c powdered sugar
• 1/2 cup walnuts -- chopped corse