In a bowl or a jar, add the oats, protein powder, almond milk, cocoa powder, maple syrup, vanilla, and sea salt. Mix everything well until the texture is smooth and the protein powder is fully blended.
Cover the container and place it in the fridge for several hours or overnight. This allows the oats to absorb the liquid and soften.
The next day, remove the oats from the fridge and give them a good stir. If the mixture looks too thick, add a small amount of almond milk and mix again until it reaches the desired consistency.
Divide the oats into two servings. Add chocolate chips, chopped walnuts, and peanut butter on top if using. Serve and enjoy.