In a large bowl combine all dry ingredients and mix well to combine
Add melted butter, peanut butter and stout to bowl
Mix together until just combined
Place dough in a well greased 9x5-inch loaf pan
Drizzle additional 2 tablespoons of butter on top and sprinkle with granola or rolled oats if desired
Bake in 350 degree oven for 50 to 60 minutes or until a toothpick inserted into the center comes out clean. Let cool & run knife around edges before removing from the pan.