Cream butter and sugar, add eggs, beaten very lightly, and the baking soda, dissolved in the sour cream.
Beat well, then add bananas, flour, 1/4 teaspoon salt and vanilla.
Bake in a well greased loaf pan, 7-1/4 x 11-1/4 x 1-1/2 inch, in 350 degrees Fahrenheit oven.
Bake for 35-45 minutes or until toothpick comes out clean.
Serving suggestion: cool cake and cut into layers and fill with cream cheese frosting, or spread with whipped cream cheese just before serving. Recipe can be doubled and baked in 10 inch round pans.
