From there, it’s up to your personal preference. Arabica beans have a higher acidity, with notes of fruit and berries. Robusta beans are darker and richer, with more caffeine. Different levels of roasts — light, medium, dark — determine how much of the beans’ oils will break through the surface of the bean, which also affects acidity, flavor, and caffeine levels. “Get to know your local coffee expert,” recommends Awan. Nothing beats a conversation with a barista or local coffee roaster who can help you try different beans and roasts, and to experiment with those variables in real time. Finding your favorite is all part of the fun.
“Last night was a perfect test of the single-cup concept. I had already programmed and prepped my 3 a.m. standard coffee brew, however, I still wanted a cup of coffee. I switched over to the single cup and brewed my cup, then switched back and pressed the program button to ensure it would still brew the main pot at 3 a.m. Worked like a charm!! Before, I would have had to brew the entire eight cups that were ready, toss out most of it, and set up my morning brew all over again.”
It can take a little while to get to know the ins and outs of a new coffee maker. In CR’s labs, each drip coffee maker we test brews roughly 65 cups by the time our engineers are through with it. And brewing is just one of many aspects we look at. We test for handling and convenience, too, so you can choose a model that helps you sail through morning madness. 

“I am a coffee snob, and one of my favorite things about traveling to Europe is their espresso and cappuccinos. A couple years ago, I bought a Nespresso Aeroccino machine for making froth and a stovetop Moka pot for making espresso; the system has worked fine, but the espresso can take awhile to make (around 5-8 minutes) and there’s definitely a learning curve to making good coffee with it. … [How] does this machine do [in comparison]? Stellar. Absolutely stellar. Once the water is in and it heats up, you flip up a lever, drop in the pod, and press the size button (espresso or lungo). Off it goes! Brewing is super quick and the espresso always comes out with a beautiful crema on top. My first drink was a cappuccino, and it was so much better than the ones I’ve been making with my Moka pot! …
Clean the inside of your machine by running water through it. Each machine will have a slightly different process, and some manufacturers provide tips and suggestions in user manuals. CoffeeLounge and other suggest mixing 2 oz. of vinegar in 20 oz. of water every now and then to clean out the machine even more thoroughly. After you use vinegar, though, be sure to rinse it three times with water to avoid any lingering vinegar taste in your next espresso.
Let’s circle back to that extra-long brew time. There are two factors that didn’t make it an automatic “no” for us. The first is that the OXO On 12-Cup is programmable. Like our experts say, grinding coffee in advance isn’t going to make the most perfect cup of coffee. But the fact that you can program the machine’s “wake-up time” to start brewing and have coffee ready when you are takes the sting out of the wait.
For hundreds of years, making a cup of coffee was a simple process. Roasted and ground coffee beans were placed in a pot or pan, to which hot water was added, followed by attachment of a lid to commence the infusion process. Pots were designed specifically for brewing coffee, all with the purpose of trying to trap the coffee grounds before the coffee is poured. Typical designs feature a pot with a flat expanded bottom to catch sinking grounds and a sharp pour spout that traps the floating grinds. Other designs feature a wide bulge in the middle of the pot to catch grounds when coffee is poured.
Prior to the introduction of pre-measured self-contained ground coffee filter rings, fresh coffee grounds were measured out in scoopfuls and placed into the metal percolator basket. This process enabled small amounts of coffee grounds to leak into the fresh coffee. Additionally, the process left wet grounds in the percolator basket, which were very tedious to clean. The benefit of the Max Pax coffee filter rings was two-fold: First, because the amount of coffee contained in the rings was pre-measured, it negated the need to measure each scoop and then place it in the metal percolator basket. Second, the filter paper was strong enough to hold all the coffee grounds within the sealed paper. After use, the coffee filter ring could be easily removed from the basket and discarded. This saved the consumer from the tedious task of cleaning out the remaining wet coffee grounds from the percolator basket.
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.
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