Coffee Roasting

Up until the 20th century, it was more common for at-home coffee drinkers to roast their coffee in their residence than it was to buy pre-roasted coffee. During the 20th century, roasting coffee in the home faded in popularity with the rise of the commercial coffee roasting companies. In recent years home roasting of coffee has seen a revival, and while there may be economic advantage, primarily it is a means for the coffee aficionado or coffee snob to get access to better quality, fresher roasted beans. Home roasting is the process of buying green coffee beans and roasting them in your own home. Roasting coffee in the home is something that has been practiced for centuries, and has included methods such as heating over fire coals, roasting in cast iron pans, and rotating iron drums over a fire or coal bed.
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Source: Wikipedia