To make ahead: Refrigerate the almond milk for up to 3 days.
Tips: To prepare in an Almond Cow machine, place almonds in basket of the machine. Pour water into the base, up to minimum line, adding more if necessary. Close and grind for 1 minute (2 cycles). Discard almond pulp or reserve for another use (see below). Place dates in the basket, grind for 1 minute. Discard date pulp. Whisk vanilla, salt and sweetener, if using, into the almond milk.
You can add the leftover almond and date pulp to hot cereals and smoothies.