The proliferation of marijuana edibles for both medical and recreational purposes is giving rise to a cottage industry of baked goods, candies, infused oils, cookbooks and classes that promises a slow burn as more states legalize the practice and awareness spreads about the best ways to deliver the drug. Edibles and infused products such as snack bars, olive oils and tinctures popular with medical marijuana users have flourished into a gourmet market of chocolate truffles, whoopie pies and hard candies as Colorado and Washington legalized the recreational use of marijuana in the past year.

In this Thursday, July 10, 2014, photo, Mike Fitzgerald, right, teaches behind a sample display of cannabis-infused products during a cooking class at the New England Grass Roots Institute in Quincy, Mass. Some pot users turn to edibles because they don't like to inhale or smell the smoke, or just want variety or a longer lasting, more intense high. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, a white board displays cooking class information at the New England Grass Roots Institute in Quincy, Mass. The proliferation of marijuana edibles for medical and recreational use is giving rise to a cottage industry of foods, infused olive oils, cookbooks and classes as more states legalize marijuana use. Cooking classes have sprung up. One in Denver – led by a chef who has turned out chocolate-covered bacon and Swedish meatballs with a marijuana-infused glaze – has grown so popular that it will be offered every week in August. It's also part of a vacation package that provides pot tourists with a stay at a cannabis-friendly hotel (vaporizer and private smoke deck included), a visit to dispensaries and growing operations, and the cooking class. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, Melissa Fitzgerald discusses how to prepare a cannabis-infused dipping sauce during a cooking class at the New England Grass Roots Institute in Quincy, Mass. The Washington state Liquor Control Board adopted rules to require recreational marijuana products to be labeled clearly as such; to be scored so a serving size is easy to distinguish; and to be approved by the board before sale. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, Mike Fitzgerald discusses how to prepare a cannabis-infused cooking oil during a cooking class at the New England Grass Roots Institute in Quincy, Mass. For many sick people, especially those with cancer, smoking marijuana is not a safe option, and some edibles can deliver a longer-lasting therapeutic dose that doesn’t give them a buzz. BlueKudu, in Denver, started producing marijuana chocolate bars for medicinal purposes three years ago. Since recreational use became legal this year in Colorado, owner Andrew Schrot said, the wholesale business has more than doubled its sales from several hundred chocolate bars sold a day through dispensaries to more than 1,000, at $9 to $17 a piece. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, a student examines a sample of the cannabis strain “granddaddy purple” during a cooking class at the New England Grass Roots Institute in Quincy, Mass. In Vermont – one of 22 states that allow the use of medical marijuana, along with the District of Columbia – the Legislature this year passed a bill that allows more people to get medical marijuana and called for a study of financial effects if the state were to allow recreational use. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, students taste a cannabis-infused dipping sauce prepared during a cooking class at the New England Grass Roots Institute in Quincy, Mass. The proliferation of marijuana edibles for medical and recreational use is giving rise to a cottage industry of foods, infused olive oils, cookbooks and classes as more states legalize marijuana use. (Photo by Michael Dwyer/AP Photo)

In this Thursday, July 10, 2014, photo, Mike Fitzgerald holds a storage bag of cannabis-infused cookies marked “medicated” during a cooking class at the New England Grass Roots Institute in Quincy, Mass. Users of pot edibles, such as cookies, are often advised to eat only a portion so they don't get too high. Education about proper dosing has become a priority after at least one death and a handful of hospital visits were linked to consuming too much of an edible. (Photo by Michael Dwyer/AP Photo)