In a large jar or an empty Thokoman tub, add milk, chia seeds, peanut butter, and honey. Stir with a spoon to combine. The peanut butter doesn’t need to be completely mixed with the milk (doing so leaves swirls of peanut butter to enjoy the next day).
Add oats and stir a few more times. Then press down with a spoon to ensure all oats are moistened and immersed in milk.
Cover securely with a lid and set in the refrigerator overnight (or for at least 6 hours) to set/soak.
The next day, open and enjoy as is or garnish with desired toppings. Options include fresh fruit, nuts, seeds, or granola.
OPTIONAL: Transfer oats to a saucepan and heat over medium heat until warmed through. Add more liquid as needed if oats get too thick/dry.
Overnight oats will keep in the refrigerator for 2-3 days, though best within the first 12-24 hours. Not freezer friendly.