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How Are Coffee Beans Roasted?

Published in Coffee Roasting 2 mins read

The process of roasting coffee beans, as described in the reference, involves several distinct steps within a roaster to transform green coffee into the aromatic beans we recognize.

The Coffee Bean Roasting Process

Roasting is a heat-driven process that brings out the flavors and aromas locked inside the raw coffee beans. Based on the provided information, the key stages involve preparing the beans, applying heat, continuous monitoring, and post-roasting handling.

Here are the steps involved:

  1. Step 1: Batching the Beans
    The process begins by placing the green coffee beans into the roaster. This is done in small batches, which allows for better control over the roasting parameters and ensures even heat distribution throughout the process.
  2. Step 2: Hardening with Flames
    Heat is applied to the beans. The case of the beans are hardened using flames, which initiates the physical and chemical changes within the bean.
  3. Step 3: Constant Rotation
    Inside the roasting machine, the beans are constantly rotated. This continuous movement is crucial for ensuring that heat is applied evenly to all beans, preventing scorching and promoting consistent development.
  4. Step 4: Regular Checking
    To monitor the progress of the roast, the beans are checked every few seconds. This allows the roaster to observe changes in color, size, and aroma, making critical decisions about temperature and time.
  5. Step 6: Releasing Gasses
    During roasting, internal pressure builds up as gasses are produced within the beans. These gasses are released as part of the process.
  6. Step 7: Protection and Preservation
    After roasting is complete, steps are taken to protect and preserve the quality of the beans. This typically involves cooling the beans rapidly to stop the roasting process and then storing them properly to maintain freshness and prevent degradation.

Summary Table of Roasting Steps

Step Action Described
1 Placing beans in roaster in small batches
2 Hardening case using flames
3 Constantly rotating inside the machine
4 Checking the beans every few seconds
6 Releasing the gasses
7 Protecting and preserving the beans

These steps collectively outline the fundamental actions taken during the critical roasting phase of coffee production, transforming raw beans into their roasted state.

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