How to Roast Coffee Beans Commercially?

The process of roasting coffee takes place after the processing of coffee and before the brewing of coffee. It includes primarily the steps of sorting, roasting, cooling, and packaging, although it may also include the step of grinding.

Bags of green coffee beans are opened by hand or by machine, placed into a hopper, and screened to remove any foreign matter. A process of sorting and classifying the seeds, cooling after roasting, grinding (optional), and packaging. When green coffee beans are roasted, they turn a rich, dark brown and develop a distinctive aroma.

Initially, the process is absorbing heat, but it becomes exothermic around 175 °C (giving off heat). This means that the beans are heating up on their own and that the roaster's heat source may need to be adjusted. The roasted beans are dumped from the roasting chamber at the end of the roasting cycle and are typically cooled by air or water-quenching.

Coffee beans lose 15 to 18% of their mass during the roasting process, owing primarily to water loss but also to volatile compounds. Although the beans lose weight during the roasting process, their size doubles due to physical expansion caused by an increase in internal pressure from vaporized water.

Distinct parts of the world have different traditional methods for roasting coffee. If you want to make a "butter roast," you can coat the coffee with oil (traditionally clarified butter) and sugar before roasting it. When the beans are roasted, a caramelized layer forms on top of them.

Some coffee drinkers even do their own roasting as a hobby to try out different bean flavors and keep their roasted coffee as fresh as possible.

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About US | OCM Profile

OCM ( was started in 2007 with the first webpage about coffee machines. And for a number of years, we focused on helping people find their desired coffee machine (we still are helping folks with that! So, if you are looking for coffee machines for office or restaurants - check out the link). 

In 2010, we started getting enquiries on restaurant marketing and we start to help food and beverage brands with their marketing. Below are campaigns and events that we have done over the years: 

OCM's campaigns: F&B Marketing Ideas by OCM 

OCM's Events: F&B Industry events by or with OCM

Check out this restaurant marketing guide to learn more about the many campaigns and companies we have worked with. 

Since then, we have also created many marketing workshops and classes for the F&B industry. Many of these modules are still running in tertiary institutions such as Temasek Polytechnic Skillsfuture Academy and also ITE College East COC classes, below are some snippets of our lectures and workshops: 

OCM’s F&B workshops: Food and Beverage Marketing Lectures | Workshops - click to watch classes on customer journey map, JTBD and more. 

So, if you are looking for industry practitioners to help you scale your coffee or F&B businesses, do drop us a message or book an appointment. Do also check out our various social media platforms on regular F&B and coffee market updates: 

For regular coffee (F&B) related videos: OCM Youtube

For Daily Coffee Inspiration (fun coffee content): OCM IG

For insights into the coffee (F&B) industry: OCM LinkedIN 

PS: For the coffee lovers, we continue to share coffee articles (and videos) and have also started a free coffee class section (with free online coffee training supported by coffee partners).

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