With total immersion brewing, the AeroPress produces uniform extraction for the ultimate in full coffee flavor.
You can also make a full carafe of coffee using the AeroPress in less time than it takes to brew a pot of drip coffee. Two 3-scoop or 4-scoop pressing, topped off with hot water, will fill most vacuum carafes.
The AeroPress is the result of several years of applied research by inventor/engineer Alan Adler, who conducted numerous brewing experiments, measuring the brew with laboratory instruments. The experiments demonstrated that proper temperature, total immersion and rapid filtering were key to flavor excellence. He then designed and tested dozens of brewers before settling on the AeroPress design. Adler's best-known invention is the Aerobie flying ring which set the Guinness World record for the world's farthest throw (1,333 feet).
Total immersion of the grounds in the AeroPress completely solves these problems. All of the grounds contact the same water temperature, and the brewing process is short and sweet. The gentle air pressure of the AeroPress also extracts extra flavor from the coffee. Ordinary drip brewers leave a lot of flavor in their soggy grounds.
The drip method cannot make a robust single cup because the small amount of water doesn't heat the bed enough for rich extraction. It is also slow. AeroPress makes one to four servings with a single pressing in less than a minute. The flavor is equally rich for any number of cups.
Most coffee lovers agree that espresso is less bitter than drip brew because of the shorter brewing time. However when we ran comparison taste-tests in the homes of espresso lovers, they all agreed that AeroPress espresso tasted better than the brew from their high-priced European espresso machines--why? The reason is that the total immersion brewing of the AeroPress yields a robust flavor at lower temperature--and lower temperature brew is far less bitter. Home espresso machines don’t allow adjustment of temperature. But even if they did, their lack of total immersion would not yield robust flavor at reduced temperature. In addition to smoother taste, the AeroPress has several other advantages over conventional espresso machines.
Many single-cup pod brewers have come to market recently. Some of these machines make American coffee. Others make espresso. They range in price from about $60 to several hundred dollars. A highly respected product review magazine tested the three most popular pod brewers and reported the flavor as "mediocre at best."
People see some similarities between the AeroPress and a French Press. Both use total immersion and pressure. But the similarities end there.
The filter in the French Press is at the top of the mixture. Because coffee floats, the floating grounds clog the filter and makes pressing and cleaning very difficult. Users are instructed to use only coarse ground coffee. But this reduces the amount of flavor that can be extracted from the coffee and necessitates long steeping times which extract bitterness.
Furthermore, even coarse ground coffee includes many fine particles. These small particles pass through and around the filter resulting in a bitter, gritty brew. The particles in the brew continue to leach out bitterness. Consequently French press users are advised to drink or decant the brew immediately. Also, some particles clog the filter screen making pressing and cleaning very difficult.
AeroPress coffee is micro-filtered. It so pure and particle-free that it can be stored for days as a concentrate. The concentrate can be drunk as espresso, mixed with milk for lattes, or diluted to make American coffee. French presses cannot make espresso or lattes. Finally, cleaning the French press is quite a chore. The AeroPress chamber is self-cleaning. A ten-second rinse of the plunger is all that's required.