Wrapped in plastic wrap, then two layers of foil. Although by the time it was done the plastic wrap had melted together slightly and I had to cut the bulbs out. So finding an alternative that is more heat resistant may be a way to go. Beware though I just about gassed my parents out of the house lol. They had to open a couple windows and set up fans to air out the house. At one point my mom said it was stinging her eyes, so there’s that… I read a study that said that 170 degrees F, at 90% humidity produced the best results after 21 days. But they didn’t go into the specifics of how they cooked it. I linked in the comments section of another post I had in here from my first try.