In a jar or bowl, combine rolled oats, almond milk, Greek yogurt, chia seeds, protein powder (if using), cinnamon, and vanilla extract.
⅓ cup rolled oats, ½ cup almond milk, ¼ cup Greek yogurt, 1 tbsp chia seeds, ½ scoop protein powder, ¼ tsp cinnamon, ¼ tsp vanilla extract