As the marijuana industry explodes into untapped markets, the race is on to deliver increasingly potent new products. But some companies are focused on perfecting the chill pill: a microdose of marijuana in a humble mint.

The first time cannabis chocolatier Vanessa Lavorato tried a marijuana-infused edible, it was on 4/20, the national cannabis-culture holiday, and she was at a celebratory gathering in Santa Cruz.