The ones on the right have been roasted at a temperature of 220°C
to 240°C, have a bold, smoky, bittersweet taste and a dense caramel-like
sweetness. The latter is the more popular blend in Thailand. During the roasting
process caramelization takes place and the colour of the bean changes from pale
green to light or dark brown, depending on the temperature: the higher the
temperature, the darker the beans.
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