Bread Machine Banana Bread

Name: Bread Machine Banana Bread
Ingredients: 1 3/4 cups all-purpose flour (see Cook's Note); 1 cup toasted pecans, chopped, optional; 1/2 cup light brown sugar, lightly packed; 1/2 cup granulated sugar; 1 teaspoon baking soda; 1 teaspoon ground cinnamon; 1 teaspoon kosher salt; 1/2 cup melted unsalted butter or vegetable oil; 2 large eggs; 1/4 cup buttermilk, sour cream or yogurt; 1 teaspoon pure vanilla extract; 4 soft, very ripe, darkly speckled medium bananas, mashed (about 1 1/2 cups)