Drain the almonds and transfer to a blender.
Add water, salt, and xanthan gum.
Process at high speed for about a minute.
Line a four-cup measuring jug with a nut-bag, and pour the mixture into it.
Squeeze the bag as hard as possible to get as much milk as possible. Then, pour the milk into a saucepan; Save the solids left in the bag for other uses.
Heat the milk over medium-high heat, stirring occasionally until it almost reaches boiling point (don't let it boil). Remove from the heat and let cool to room temperature* see note at the end.
Transfer to a bottle, close, place in the fridge, and let cool for a few hours. To froth: pour milk into the frother, press the start button, and let it work until you get the desired consistency. Add this frothy milk to coffee, hot cocoa, chai latte, etc.
The milk keeps in the fridge up to three days.
Shake well before use.
