An edible is a food or drink, often a sweet or a small snack like a cookie, that is infused with THC. Legally, there should be no more than 10 mg of THC per serving and no more than 100 mg per package. This can be especially dangerous for youth because often a small product (such as a single gummy bear) can contain more than one serving of THC. Average THC Potency: 5-10mg per serving* *Cannabis edibles are measured in milligrams of THC per serving as opposed to percentages.