Strength control is understood to be regulated by the ratio of coffee to water. For example, more ground coffee and less water would result in a stronger brew. But, how does that work with a single serve machine, when you cannot regulate the amount of coffee and yet you can regulate the strength and volume of water simultaneously? In other words, you can select an 8-ounce drink to be strong or weak, but without changing the amount of coffee.
Over the course of the year, we reviewed fewer than a dozen darker roasts. Most were medium-dark at best; some barely that. The majority of darker roasts we reviewed were sent by roasters in Taiwan and most were espressos, reflecting both the time-honored espresso practice of emphasizing chocolate and sweetness through moderate dark roasting, as well as, perhaps, a preference in Taiwan for more traditional styles of espresso as opposed to the lighter-roasted, brighter style of espresso now popular with the leading edge of North American roasters.