Roasting coffee in a pan or a work does not work well because the coffee gets roasted unevenly. Popcorn popper is a better choice but then again not all popcorn popper can do the job. The popper need to have enough airflow and should circulate the coffee beans well for it to roast evenly.
Besides telling you the best popcorn poppers for coffee roasting, this article also gives you info on the various stages of coffee roasting and other tips you should be aware of to make a perfect roast.
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