In a mixing bowl, combine rolled oats, cocoa powder, and a pinch of salt. Mix well to combine all the dry ingredients.
In a separate bowl, whisk together almond milk, peanut butter, maple syrup, and vanilla extract until smooth. If the peanut butter is too thick, you may microwave it for a few seconds to make it easier to mix.
Pour the wet ingredients over the dry ingredients and stir until well combined. Be sure all oats are well-coated.
Divide the mixture equally into two jars or containers with lids.
Seal the jars and refrigerate overnight (or at least for 4 hours) to allow the oats to absorb the liquid.
When ready to serve, give the oats a good stir, and top with sliced banana and chopped nuts or granola for added crunch.
Notes
Serve in clear glass jars to showcase the layers and toppings. Drizzle a little extra peanut butter on top for added flavor and aesthetic appeal.