Step 1

Tear 16 pieces of foil (about 6" wide) from a roll of tin foil. Stack the foil and use a pair of scissors to cut the foil in half horizontally. Set aside.

Step 2

Cut pieces of plastic wrap (about 5" wide and large enough to wrap an individual head of garlic). Wrap one head of garlic tightly in each bit of plastic and set aside.

Step 3

Wrap the individual heads of garlic in one piece of foil. Then wrap it in another piece of foil and set aside. Continue to double wrap the garlic until each head has been covered.

Step 4

Place a rack in the bottom of the Instant Pot and add the wrapped garlic.

Step 5

Secure the lid with the vent closed. Set the Instant Pot to "Keep Warm" and set the timer for 99 hours. (Note: you'll have to continue to set the timer every 4 days until the garlic is done).

Step 6

Let the garlic ferment in the warm environment for 3 weeks (resetting the timer as necessary.

Step 7

Remove the foil and plastic wrap and store the black garlic in airtight containers at room temperature.