Burnt flavors in coffee are the result of over-roasting, fast roasting, or roasting in a high-heat environment. This often occurs when the initial roaster temperature when the green coffee is introduced is too high. Usually, scorching and tipping result in burnt flavors. Sometimes, Smokey notes in a cup can be a result of native qualities to the coffee, and not necessarily a defect, or the result of an exotic process such as a Monsooned or Aged coffee.