Mix one part Chaga powder, one part cocoa powder, and two parts coffee powder of your choice and store in an airtight container for use in a French press or Bialetti. If you want to prepare the Chagaccino in an espresso machine, leave out the cocoa powder because it clumps quickly and can block the machine.
For one cup, prepare one or two tablespoons of the mixture in a bialetti or a French press depending on how strong you like your coffee and prepare as usual. To make in an espresso maker, just mix chaga powder and espresso powder in a ratio of 1:2 and prepare as usual.
Serve with hot, frothed plant milk or with frothed cold plant milk and over ice cubes. You can sprinkle it with coconut sugar, cinnamon or cacao powder.