In a medium-sized bowl, whisk together the Nutella, honey, and milk until smooth and well combined.
Add the oats and chia seeds, and stir until everything is evenly mixed.
Cover the bowl and refrigerate for at least 4 hours, or preferably overnight. Note: For a convenient grab-and-go option, divide the mixture into individual jars with lids before refrigerating.
Stir before serving and serve warm or cold with your favorite toppings.
Notes
Optional toppings: sliced bananas, strawberries, berries, and nuts
If your oats turn out too thick, just add a splash of milk to achieve the consistency you prefer. If they’re too thin, you can thicken them up by stirring in a bit more chia seeds or Greek yogurt.