The bisquettes are bound, at controlled pressures and densities, from chippings of natural hardwoods and fruitwoods which results in a consistent and predictable burning behavior. The smoker burns a flavor bisquette once every 20 minutes producing a clean smoke flavor. As each is burnt, it is gently pushed from the burner element by the next bisquette, to be extinguished in the bowl of water. When wood burns, the smoke flavor is produced in the initial minutes of the burn. Wood that has been burning for too long, or at too high a heat, will dramatically distort the flavor of the food being smoked. The after taste can be acidic or bitter. However, using a Bradley Smoker and the Flavor Bisquettes, your meals will have that natural smoked taste every time.