Add almond milk, vanilla, and sweetener to a blender and mix well.
With the blender on a very low setting, add the chia seeds and mix. If you would like to add other ingredients, do it here.
Transfer to a container and stir every 5 minutes for the first 15 minutes then let sit for 30 minutes to 1 hour. Transfer to the refrigerator.
When ready to serve, add toppings.