Pour the almond milk (or non-dairy milk of choice) into a large jar, followed by the chia seeds and sweetener. Secure the lid and shake very well for 2 minutes.
Refrigerate at least 4 hours (preferably overnight). If you can shake the jar every 1 to 2 hours to ensure the chia seeds don’t sink to the bottom and clump up.
When ready to consume, stir well and top with your choice of toppings, such as cacao nibs, hemp seeds, and/or berries.