In a jar or a bowl, combine the rolled oats, chocolate protein powder, unsweetened cocoa powder, chia seeds, and a pinch of salt. Stir well to ensure all the dry ingredients are evenly distributed. This step is crucial for preventing clumps of protein powder in your oats.

Add the almond milk, Greek yogurt, maple syrup, and vanilla extract to the dry ingredients. Mix everything together until it's well combined and there are no dry spots. The mixture should be thick and creamy, like brownie batter.

Cover the jar or bowl and refrigerate for at least 4 hours, or overnight. The chia seeds and oats will absorb the liquid and soften, creating a thick, pudding-like consistency.

The next evening, give the oats a good stir. If the mixture is too thick, you can add a splash of milk to reach your desired consistency.

Top your High Protein Brownie Batter Overnight Oats with your favorite toppings. Chocolate chips, fresh berries, nuts, and a dollop of peanut butter are all excellent choices.

Serve chilled as a quick dinner dessert or healthy treat.