Add the almond milk and vanilla extract to a small saucepan over low/medium heat. Stir to combine. Heat the milk through until piping hot but not boiling.
Add the instant coffee to a large mug. Add the granulated sweetener. Add the hot milk and stir well to combine, dissolving the coffee and sweetener.
Add the butter to the mug. Stir well to combine. Let the butter completely melt into the milky coffee.
Carefully use a hand held stick blender or milk frother and blend the coffee and butter. Continue blending until you have a thick frothy layer on the top of your coffee. Serve hot.
