In a medium-sized mixing bowl, add rolled oats, chia seeds, and milk. Pour in vanilla extract, maple syrup, salt, and protein powder. Incorporate peanut butter and mix until all ingredients are well-blended.

Stir the mixture vigorously to ensure a smooth consistency where the oats are coated in the milky mixture.

Transfer the mixture into an airtight container or divide into individual mason jars, sealing tightly.

Place the sealed container or jars in the refrigerator for at least 4 hours, preferably overnight.

When ready to serve, stir and optionally microwave for 30 seconds. Top with fresh fruits, granola, or a drizzle of honey.