Dry Ingredients: Add the oats, chia seeds, and mini chocolate chips (if using) to a large mixing bowl. Sprinkle the cocoa powder over the top of the oats, then use a spatula to mix well until the cocoa is evenly distributed (this reduces clumping).
Wet Ingredients: Add the milk, yogurt, maple syrup, vanilla, and salt to the bowl and mix well until mostly combined; some of the cocoa may clump at the top. Let sit for 5 minutes, then stir in again to fully incorporate the cocoa. Let sit for another 5 minutes, to thicken.
Store & Serve: Transfer the oatmeal to jars or other containers, then store in the fridge for at least 4 hours, preferably overnight. Top as desired and enjoy cold or warm; leftovers will keep in the fridge for up to 5 days.
Video
Notes
Non-dairy Milk: I recommend using a thick and creamy milk, like cashew, oat, or soy milk.
Oats: I like to use 50-50 mix of instant oats and rolled oats for a creamy and hearty texture! Instant oats will make the oatmeal more creamy, while rolled oats add more of a chew.