How to Roast Cocoa Beans

Roasting cacao beans is a crucial step in developing chocolate flavor — it determines most of the aroma and the balance between bitterness and smoothness in the final product. Below is a detailed, practical guide suitable for both small-scale (handmade) and larger-scale roasting.

1. Preparing the Beans

• Dried cacao beans (moisture content around 6–8%).

• Tools: cast-iron pan or roasting machine, thermometer (if available), cooling tray, fan or cool air dryer.

⚠️ If the beans are still moist, sun-dry or pre-dry them lightly before roasting to avoid burning the outer shell.

2. Stages of Cacao Roasting

A. Pan Roasting (Handmade)

1. Preheat the pan to around 120°C (248°F).

2. Add the cacao beans and stir constantly over medium heat.

3. Gradually increase the temperature to 140–160°C (284–320°F). Roast for about 15–25 minutes, depending on the bean type.

4. Watch for signs:

   • The beans begin to crack and separate from their shells.

   • A distinct chocolate aroma appears.

   • The beans turn dark brown and slightly oily on the surface.

5. When done, pour them onto a tray to cool quickly (do not leave in the pan or they’ll continue burning).

B. Roasting with a Machine (Temperature-Controlled)

• Drying stage (0–5 min): 110–120°C (230–248°F) to remove surface moisture.

• Flavor development (5–15 min): 130–150°C (266–302°F) — chocolate aroma begins to form.

• Final stage (15–25 min): 150–170°C (302–338°F) — deep, rich cacao flavor develops.

⏱️ Total time: 20–25 minutes.
After roasting, cool quickly to below 40°C (104°F) within 10 minutes.

3. Cooling & Winnowing

• Once cooled, crack and winnow the beans (by hand or using a winnower) to remove the papery husk.

• The inner part, called cacao nibs, is used to make chocolate or cacao powder.

4. Roast Levels & Flavor Profiles