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If you desire a great test to see if beans are effectively roasted, fracture one open before you purchase it. A good bean, generally, will be darker on the inside than it is on the exterior. Poorly roasted beans, which have been processed too rapidly and have not reached their full capacity, will be darker on the outside. Buy these at your own threat! There is a simple service to all of this. A one cup coffee machine will fix the inconvenience and cost issues along with being stuck with a pot of 'so-so' coffee sitting on a warming plate or being