The Aeropress brewer is loved almost universally. I have neither talked to anyone who complained about it nor read a negative review by someone who bought it and didn’t like it. This love and appreciation by coffee lovers all over the world is mainly due to the delicious coffee the brewer produces, ease of use and portability but not due to the delicious espresso it produces. You see, the AeroPress promises to be a coffee and espresso maker but coffee lovers, including myself, disagree with the “espresso maker” part.
Now, a company named Fellow, which makes the fancy Stagg gooseneck kettles and other coffee brewing equipments and accessories, decided to try and bring the AeroPress closer to its promise of making espresso by manufacturing and selling the Prismo. To be clear, the Prismo does not promise espresso shots instead it promises espresso-style (more on that in a second) shots. According to Fellow (copied from their website), the reason they can’t claim that the Prismo produces an espresso shot is the following:
“Traditional espresso has a long and honored tradition of how it’s made, from tamping the puck to pulling a shot in the right amount of time, to that well-revered 9 bars of pressure. There were enough differences between how “espresso-style” coffee with Prismo works and traditional espresso that we felt the need to let our customers know. Here are a few important differences we wanted to share:
The pressure inside Prismo doesn’t reach 9 bars… unless you’re superman! By our calculations, you would need to put over 2,000lbs of force on top of your Aeropress Coffee Maker to reach 9 bars (130psi) with Prismo. That’s not something we recommend trying at home!
The temperature of a Prismo shot is somewhat lower than an espresso shot. High end espresso machines tend to have pre-heated group heads, which help to maintain high temperatures in the puck while pulling a shot. Our preferred recipes with Prismo haven’t involved pre-heating, which means the coffee slurry temperature is a little lower. This lower temperature does great for producing chocolatey flavors with a lot of body and is excellent for blends and medium to dark roasted coffee. Your local cafe’s espresso blend will probably work great! However, for some lighter roasted single origin coffees, we’ve prefered brewing a full cup of coffee on the Prismo rather than an espresso-style shot.
Our best tasting espresso-style recipe takes about 70 seconds from start to finish. We’ve loved the flavor we’re getting from Prismo’s espresso-style coffee when we give it just a little extra time to develop. With some stirring, the right temperature water, and a strong press, we’ve produced full-bodied shots with a thick, yummy crema that lasts. But yes internet, a traditional espresso shot is about 20-30 seconds.”
Fellow’s approach to the Prismo was to replace the original plastic basket (or filter holder) of the AeroPress with one that has a pressure actuated valve. This valve allows more pressure buildup inside the AeroPress, hence making it easier to produce a shot with qualities, such as crema, resembling a traditional espresso shot. The way the Prismo allows for more pressure buildup is simply by having the valve require more pressure from the user before it opens up to release the coffee. This idea is very similar to pressurized baskets used in lower end espresso machines. The pressurized baskets help cheaper machines achieve the pressure needed for an espresso shot while making the grind and the grinder less important.
The Prismo comes in two pieces, the first piece is the plastic basket replacement and the second piece is the built-in 80 micron filter.
The Prismo has few benefits that I like:
- It allows for the use of paper filters if you prefer paper over metal filters. I personally use a combination of both (yes, a paper filter fits on top of the metal Fellow filter)
- It eliminates the need for brewing using the inverted method since the valve does not release coffee unless you’re applying pressure. This also makes the AeroPress much easier to use as you do not have to rush and insert the plunger after you have poured enough coffee to start the blooming phase of your brew.
- The metal filter by itself, which is included with the Prismo, makes the device worth the $20 I paid for it.
After playing with the Prismo over the period of few days, I don’t believe that it produces an espresso-style shot/coffee. The Prismo produces excellent coffee and an americano I made with it was absolutely delicious, and the “espresso-style” shots I made were full bodied, had a rich mouthfeel and really maintained some of the chocolatey notes I usually pick up in the shots I pull using my Nuova Simonelli Musica (coffee I used was Lavazza Top Class). However, I think the same way the Bialetti Moca Pot and the Turkish coffee made in the Ibrik don’t claim to make espresso or espresso-style coffee, the Prismo shouldn’t claim that either. The reason I believe so is that I don’t think it’s fair for the Prismo! While Fellow went to great lengths to explain what they mean by espresso-style, I’m positive that many people out there will confuse espresso-style with espresso and the Prismo will still be compared and measured against traditional espresso and the verdict won’t be in Prismo’s favor. Having said that, when the Prismo is judged by itself as a coffee making device or accessory, that can take a brewer (AeroPresso) to the next level, the results are very favorable and highly desirable.