I got this recipe from a dear friend and it's the best I've ever had, so moist and rises beautifully!
1 3/4 cups flour; 1 1/2 cups sugar; 1 teasp. baking soda: 1/2 teasp. salt; 2 eggs slightly beaten; 3 over ripe bananas mashed; 1/2 cup canola oil; 1/4 cup sour cream; 1 teasp. vanilla; 1 cup chopped walnuts (optional).
I must tell you that the first time I made this I mistakenly used 1/2 cup sour cream so I've continued to do that. also I tried it with the walnuts and find it much better without, MHO. NO BAKING POWDER! Enjoy!