Preheat oven to 350°F. Grease a 9" loaf pan with butter or non-stick spray.
In a large bowl, whisk together flours, oats, salt and baking soda until well blended.
In a separate bowl, stir buttermilk, molasses and melted butter until uniform.
Pour wet ingredients into dry and fold gently until just combined—don’t overmix.
Transfer dough to pan, smooth top, sprinkle with extra oats. Bake 50–55 minutes or until a skewer comes out clean.
Let loaf cool 5 minutes in pan, then finish cooling on a rack before slicing.
