I usually mix all the ingredients together in the same bowl. Also, instead of mixing the nuts in he batter, I just sprinkle them on top because my daughter doesn't like walnuts or pecans. It's still yummy!
1/2 cup butter, room temp.
1 cup sugar
2 large eggs
1 1/2 cups unbleached flower
1 tsp. baking soda
1 tsp. salt
1 cup mashed very ripe bananas
1/2 cup sour cream
1 tsp. vanilla
1/2 cup chopped walnuts or pecans
Preheat oven to 350. Butter a 9x5x3 inch loaf pan and set aside. Cream butter and sugar until light and fluffy. Add eggs and beat to incorporate.
In a medium bowl, whisk flower, baking soda, and salt. Add to butter mixture, and mix until combined. Add bananas, sour cream, and vanilla; mix to combine. Stir in nuts and poor into pan.
Bake until a cake tester inserted into the center of cake come out clean, about 1 hour and 10 minutes. Let rest in pan for 10 mintutes, then turn out onto a rack to cool.