Pour the milk, yogurt and frozen berries into a 1/2 quart sized jar (with a regular mouth opening).
You can add the granola to the jar and blend it with the berries and milk or save the granola for after it's done blending. It's up to you.
To blend in the mason jar: remove the blade base of your blender pitcher and simply attach it to the mouth of the mason jar by screwing it on. Secure it tightly then flip the jar upside down and blend for 20-30 seconds, or until desired consistency. Sprinkle with granola and Enjoy!
Notes
Optionally you can make this in a regular blender, and even double the recipe to serve two! :)