“Strength, blend, decaf, cream, or sugar, there are many options when it comes to a cup of coffee. It seems every person has his or her own unique preferences to get them that perfect cup of joe. However, one factor that was often out of the home-coffee fan’s control was temperature. You either drank it at the temperature it came out of the coffee maker or you let it cool somewhat before sipping began. Cuisinart has aimed to turn that limitation on its head. This Cuisinart DCC-3650 adds a temperature control. It actually brews the coffee at one of three different user-defined temperatures. Impressive.”
The term dual boiler is used narrowly for machines with two separate boilers, and more broadly for what are more properly called dual heater (DH) machines, featuring a boiler for brewing and a separate thermoblock (TB) for heating brew water to steaming temperature – opposite to HX machines, where the boiler is at steaming temperature and is cooled to brewing temperature.
Caffè Espresso translates to “pressed-out coffee.” It’s what happens when you force hot water through finely ground coffee beans. This brewing method is challenging to master, as slight variations in pressure and temperature can produce an extremely unpalatable shot. As such, the best espresso machine is forgiving to first-time owners, it extracts rich flavor from its beans, and it offers a complex balance of sweet, sour, and bitter.
Espresso shots need to be pulled between 186 and 194 degrees F. If the water is too cold when it hits the espresso, the shot tastes sour. Too hot, and it tastes burnt. It’s trickier to hit this window if you also want your machine to steam milk, since steam requires a higher temperature — at least 212 degrees. But we struggled to get several of our machines just to pull decent espresso, never mind the milk. Sour shots were a clear sign that the water wasn’t hot enough; scorched shots indicated that the water climbed over 200 degrees.
Our brew-performance tests measure the brew temperature and contact time (how long water stays within a sweet spot of 195° to 205° F for brewing). We measure concentration using a refractometer, a device that measures the amount of coffee dissolved in each brew. Our convenience tests look at how easy it is to set timers, fill the reservoir, clean the machine, and more. And for the first time, we’re incorporating predicted reliability and owner satisfaction ratings into the new Overall Score for each model. We determine these ratings for each drip coffee maker brand using survey data collected from thousands of CR members.