Add the oats, milk, chia seeds, maple syrup, protein powder, and peanut butter to a sealable mixing bowl or individual overnight oats containers. Stir well to combine. Place the lid on and chill in the fridge for at least 2 hours or overnight to set.
1 ½ cups rolled oats, 1 ½ cups unsweetened almond milk, 2 tablespoons chia seeds, 2 tablespoons pure maple syrup, 3 scoops vanilla protein powder, ¼ cup creamy peanut butter