To a blender, add the thawed blueberries, milk, and Greek yogurt. Blend on high for 30-60 seconds, or until smooth. Note that you can blend all of the ingredients in this step if you prefer completely smooth, blended overnight oats.
1/2 cup frozen blueberries, 1/3 cup milk, 1/4 cup Greek yogurt
To a small bowl or glass jar, add the blended blueberry mixture along with the oats, protein powder, chia seeds, and flax seeds. Whisk to combine. Let the mixture set for 5 minutes, then give it another whisk -- this helps prevent the oats and seeds from settling on the bottom!
1/4 cup old-fashioned oats, 1 scoop vanilla protein powder, 1 tablespoon chia seeds, 1 tablespoon ground flax seeds
Place the lid on the jar, then let set in the refrigerator overnight, or at least 4 hours before serving. Enjoy!
Notes
Nutrition information will vary based on exact ingredients used - I used Fairlife fat-free ultra-filtered milk, as well as Oikos Triple Zero vanilla Greek yogurt with no added sugar.