In a mixing bowl, combine the rolled oats, cocoa powder, maple syrup, vanilla extract, and a pinch of salt.
Pour in the almond milk and stir well until all ingredients are combined and the oats are fully saturated.
Divide the mixture evenly into two airtight containers or jars.
Seal the containers and refrigerate overnight (or at least 4 hours) to allow the oats to absorb the liquid and soften.
In the morning, give the oats a good stir. You can add a splash of milk for desired consistency.
Top with your choice of sliced bananas, nuts, seeds, or chocolate chips before serving.
For a richer chocolate flavor, use chocolate almond milk instead of regular almond milk.
Feel free to experiment with different flavor additions like peanut butter or shredded coconut.