Start by mixing the rolled oats, cacao, and chia seeds into a 16-ounce mason jar.
Then add the peanut butter, coconut milk, vanilla extract, and pure maple syrup. Stir until chocolaty, and the rest of the ingredients are combined.
Tightly place the lid on and refrigerate overnight, preferably 6 - 8 hours.
Remove the lid and give the oats a couple of stirs. Give the oats a taste and if you need more sweetness, stir in the rest of the maple syrup.
The oats might be a little thick, so if you want to loosen them up, stir in a splash of milk until you get a creamy texture.
Sprinkle with cacao nibs and drizzle with extra peanut butter if you want.