Whisk the almond milk, chia seeds, and sweetener together in a large bowl. (For a thin and runny chia pudding, use 1/2 cup chia seeds. For a thick chia pudding, use 3/4 cup chia seeds.) Let sit for 5-10 minutes and then whisk again (this just helps prevent clumping).
Cover and chill in the fridge for 3 hours, or overnight. It helps to stir the mixture every so often during this time, but don't worry if you can't.
Stir well before serving. If it's too runny, whisk in more chia seeds and let it sit again until thickened. If it's too thick, thin it with a touch of milk.
Portion into bowl(s) and add your desired toppings. Leftovers will keep in an airtight container in the fridge for 3 to 5 days.
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