In a bowl, combine rolled oats, cocoa powder, and salt.
Add milk, maple syrup, and vanilla extract to the dry ingredients.
Stir the mixture well until all ingredients are combined.
Transfer the mixture to a jar or airtight container.
Cover the container and refrigerate overnight (at least 4 hours).
In the morning, stir the oats to combine the ingredients.
Top with fresh berries and chopped nuts if desired.
Serve chilled and enjoy your healthy breakfast!
Experiment with different toppings for variety.
Store any leftovers in the fridge for up to 3 days.