Put the instant mushroom coffee mix, coconut sugar, and boiled water in a medium-sized bowl.
Whip with a hand-held whisk on high speed for 3 to 4 minutes, or until the ingredients become fluffy and foamy.
Pour the milk (steamed or room temperature), optional vanilla, and cardamom into your favorite mug.
Spoon the whipped mushroom coffee on top and give it a quick stir before drinking immediately.