Source: original recipe can be found at the blog, Simply Recipes
adapted by There's Always Thyme to Cook
4 ripe bananas, mashed
1/3 cup melted butter
3/4 brown sugar
1 egg, beaten
1 teaspoon vanilla
1 teaspoon baking soda
Pinch of salt
1 1/2 cups of all-purpose flour
1 cup toasted walnut pieces (optional)
Preheat the oven to 350°F.
With a wooden spoon, mix the butter into the mashed bananas in a large mixing bowl. Add the sugar, egg, vanilla, baking soda and salt over the mixture and mix in. Mix in the walnuts, if using. Add the flour and mix well. Pour into a buttered loaf pan and bake for about an hour. Remove from oven when a toothpick inserted in the center comes out clean. Cool on a rack. Remove from pan. Slice and serve.