Pre-heat the oven to 375° F. Spray a 9x5 inch loaf pan with non-stick spray or grease evenly with oil. Set aside.
In a medium bowl whisk together all purpose flour, whole wheat flour, baking powder, baking soda and salt until well combined.
In a large mixing bowl take butter, sugar, yogurt and milk, whisk well.
Add dry ingredients into wet ingredients and mix until everything is combined. Do not over mix.
Pour this batter into greased loaf pan and sprinkle rolled oats on the top. Bake this loaf for 45 to 50 minutes or until top crust is golden brown and firm to touch.
Remove pan from the oven and let bread cool in the pan for 5 minutes. Then transfer the bread onto cooling rack.
Let the bread cool completely before slicing. Spread some butter or jam on the bread slice for more deliciousness.
Use this bread when it is fresh, it will stay at room temperature for only couple of days. If you have leftover, keep it in the refrigerator for 4-5 days.