1In a large mixing bowl, add 160 g rolled oats, 2 tablespoons unsweetened cocoa powder, and 2 tablespoons chia seeds.
Peel and mash 2 medium bananas in a separate bowl until smooth, then add them to the oat mixture.
Pour in 400 ml unsweetened almond milk and 2 tablespoons maple syrup.
Stir all ingredients together until well combined.
Divide the mixture evenly into jars or containers with lids.
Cover and refrigerate overnight, or for at least 6 hours, to allow the oats and chia seeds to absorb the liquid.
In the morning, give the oats a good stir. Add extra almond milk if desired for a creamier texture.
Serve chilled, optionally topped with banana slices or a sprinkle of cocoa powder.