Preheat oven to 350°F. Spray two large loaf pans with spray or grease and flour.
In a large bowl, cream sugars, oil, and eggs. Add vanilla, sour cream, and bananas. Mix well.
In a separate bowl, combine flour, baking soda, baking powder, salt, and powdered whipped topping.
Add dry mixture to wet mixture and mix well.
Pour into prepared pans. Bake for 45-50 minutes.