The secret to the Bradley Smoker is the Bradley Flavor Bisquettes which are made from select hardwoods. The Bradley Smoker burns a Bradley Flavor Bisquette once every 20 minutes producing a clean cool smoke flavor. When wood burns the smoke flavor is produced in the initial stages of the burn. when you cook wood to the ash stage you release the tars and resins from that wood. Bradley Bisquettes burn only to the charcoal stage thereby keeping the tars and resins in the wood and not on your foods. With the Bradley Flavor bisquettes you get perfect results every time you smoke.