I got this recipe from here it's my new favorite! My friend Sara told me about it, she says it's the bees-knees! It is really really good!
1 cup mashed bananas
1 cup sour cream
1/4 cup butter (I only bake with butter but the recipe called for margarine (gross!)
1 1/3 cups white sugar
1 teaspoon vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon baking powder
1/4 teaspoon salt
Preheat oven to 350 degrees F (175 degrees C). Grease and flour one 9x13 inch pan, or two 7x3 inch loaf pans.
Combine banana and sour cream. Set aside. In a large bowl, cream together the margarine and sugar until smooth. Beat in the eggs one at a time, then stir in the vanilla and banana mixture. Combine the flour, baking soda, baking powder and salt; stir into the banana mixture. Spread the batter evenly into the prepared pan or pans.
Bake for 50 minutes in the preheated oven, or until a toothpick inserted into the center of the bread comes out clean.