In a bowl, combine first four ingredients. Cool to 110°-115°. In a bowl, dissolve yeast in warm water. Sprinkle with sugar. Add oat mixture, brown sugar, molasses and 3 cups flour; mix well. Stir in enough remaining flour to form a soft dough.
Turn onto a floured surface and knead until smooth and elastic, about 6-8 minutes. Place in a greased bowl; turn once to grease top. Cover and let rise in a warm place until doubled, about 1 hour.
Punch dough down. Divide in half; shape into loaves. Place in two greased 9×5-in. loaf pans. Cover and let rise until doubled, about 30-45 minutes.
Preheat oven to 375°. Bake 30-35 minutes or until golden brown. Remove from pans to wire racks to cool. Brush with butter.