In a large mixing bowl, combine rolled oats, chia seeds, and chai spice. Whisk these dry ingredients together until well blended.

Add Greek yogurt, your milk of choice, and maple syrup to the dry mixture. Stir thoroughly until all components are well incorporated.

Divide the creamy mixture into three airtight containers or mason jars. Ensure that each container is filled evenly.

Place the sealed containers in the refrigerator and allow them to chill for at least 4 hours or overnight.

Once ready to enjoy, take the containers out of the fridge. Add your favorite toppings and mix well.