Important Note about Salt: Not all salts are made equal and cannot be substituted 1:1. If you are substituting table salt for kosher salt, you will need to cut the amount called for in the recipe by at least half.
Storage: Allow to cool completely then store in an airtight container in the fridge for up to 3 to 5 days.
Use room temperature almond milk and butter. When these ingredients are warmer, they meld with the potatoes much better than when they are cold. I recommend leaving them on the counter while the potatoes cook.