1. Choose Your Container: Start with a clean jar or container with a lid. A pint-sized mason jar (16 oz) is ideal as it provides enough space for mixing and for the oats to expand.

2. Combine Dry Ingredients: Add the rolled oats, protein powder, chia seeds, and a pinch of salt to your chosen container. Give these a quick stir with a spoon to ensure they are evenly distributed. This helps prevent the protein powder from clumping.

3. Pour in the Liquids: Pour the milk and vanilla extract (if using) into the container with the dry ingredients.

4. Add Sweetener: Drizzle in your preferred sweetener, such as maple syrup or honey. Remember, you can always add more in the morning if needed, so start with a conservative amount.

5. Mix Thoroughly: Stir all the ingredients together very well. Use a spoon to scrape the bottom and sides of the jar to ensure no dry clumps of oats or protein powder remain. A good mix is crucial for the right texture.

6. Seal and Chill: Securely place the lid on your container. Transfer the jar to the refrigerator and let it chill for at least 4 hours, but ideally overnight (8 hours). This allows the oats to soften and the chia seeds to swell, creating that perfect creamy consistency.

7. Enjoy: In the morning, give your overnight oats a quick stir. If it’s too thick, add a splash more milk. If it’s too thin, you can add a tiny bit more chia seeds and let it sit for 15-20 minutes. Add any desired toppings and enjoy your high-protein breakfast!