Yes, whey protein powder can be mixed with almond milk for those avoiding lactose in their protein shake. If you choose almond milk as an alternative due to lactose intolerance, also ensure you are using a whey protein isolate rather than a concentrate as your protein powder. Whey protein concentrates also tend to include a fair amount of lactose, unlike whey protein isolate which should not contain more than trace levels of lactose. A protein shake made with whey isolate and almond milk should provide a more easily digestible alternative for those with an intolerance.