In a mason jar or small bowl with a lid, add flax milk, chia seeds, nut butter, and maple syrup and stir with a spoon to combine. No need to fully dissolve the nut butter in the liquid so it can be enjoyed the following day.
Add in oats and stir a few more times. Press down with the back of the spoon to ensure all oats have been moistened and submerged in the liquid.
Cover with a lid and place in the refrigerator overnight.
The following day open and enjoy, can garnish and top with fruits or seeds listed above.