Mastering the AeroPress: Designing Taste with Pressure and Time

The AeroPress was invented in 2005 by engineer Alan Adler, who also invented the Aerobie flying disc. Shaped like a plastic syringe, it is an affordable roughly ¥5,000, light and hard to break, and very easy to clean. Yet the range of tastes it can make is wider than a V60, and it can even stand in for an espresso machine. Baristas around the world keep researching it — so much so that the "World AeroPress Championship" is held every year.

Why is the AeroPress an "all-rounder"?

The AeroPress is a hybrid of "immersion" and "pressure." It lets grounds and water sit in the chamber for a set time to draw out the compounds, then you push the plunger by hand to apply a few atmospheres of pressure and force it through the filter.

• Immersion advantage: stable extraction, easy for anyone to hit the same taste
• Pressure advantage: oils and body come out easily, reproducing a crema-like richness
• Paper filter: a clean result (a clarity similar to the V60)
• Metal filter (sold separately): a thicker texture leaning toward a French press

What is in the basic set

• The AeroPress itself (about ¥5,000; standard / Go / XL sizes available)
• Paper filters (about ¥1,000 for 350 sheets; ¥2.8 each)
• Measuring scoop (included)
• Stick spoon (included)
• Holder for the micro-filter (included)

The basic recipe: "Standard"

This is the maker-recommended, most basic recipe printed on the unit. Being able to make this consistently is the first step to improving.

• Beans: medium-fine, 14–17g (finer than a French press, coarser than a V60)
• Water temperature: 80–85°C (let water just off the boil cool for about 30 seconds)
• Set the chamber facing up and rinse the filter with hot water
• Add the grounds and pour 200ml of water all at once
• Stir gently with the stick for 10 seconds
• After 1 minute, push the plunger down slowly over 30 seconds
• Total brew time: about 1 minute 30 seconds

The advanced recipe: "Inverted"

A method many winning championship recipes use. Flip the unit upside down to add grounds and water, then turn it over at the end to press. Because you can fully control the contact time of water and grounds, more precise extraction becomes possible.

• Beans: 18g (medium-fine)
• Water temperature: 85°C (light roast) to 90°C (medium-dark)
• Assemble the chamber inverted and add the grounds
• Bloom with 50ml of water for 30 seconds (stir 1–2 times)
• Pour the remaining 150ml and wait 2 minutes total
• Fit the cap, place the cup over it, and flip it over
• Push down slowly over 30 seconds (about 3 minutes total)

Making an espresso-style shot

Make a concentrated shot with the AeroPress and cut it with hot water or milk, and you can make an americano, latte or cappuccino at home. Recreating the café menu with no machine investment is one of its biggest charms.

• Beans: fine, 17–20g (about as fine as for espresso)
• Water temperature: 90–92°C
• Water volume: just 60–80ml (an extremely small amount is the point)
• Time: 10s bloom + 20s push = 30s total
• Result: about 50ml of concentrated shot
• Variation 1: add 150ml of hot water for an americano
• Variation 2: 150ml of steamed milk (made with a frother) for a latte

Common troubles and solutions

Weak or watery taste

• Cause 1: the grind is too coarse → a little finer
• Cause 2: the water is too cool → 85°C or above even for light roasts
• Cause 3: not enough stirring → stir firmly for 10 seconds after pouring
• Cause 4: pushing too fast → take 30 seconds or more

Bitterness too strong

• Cause 1: the grind is too fine → one step coarser
• Cause 2: the water is too hot → lower it to 80–85°C
• Cause 3: the brew time is too long → within 1 minute 30 seconds
• Cause 4: the roast is too dark → try again with a medium-roast bean

Too heavy / too light when pushing

The best push feel is about the resistance of lightly crushing a tennis ball by hand. Too heavy means the grind is too fine or the dose too large. Too light means too coarse, or too little coffee.

Cleaning and maintenance

One of the AeroPress's biggest charms is that cleaning is overwhelmingly easy.

• After use, remove the cap and "plop" the puck into the bin (3 seconds)
• Lightly rinse the chamber and plunger with water (10 seconds)
• Once a week, wash with mild detergent (so few parts it is done in seconds)
• The plunger's rubber degrades over time → replace it in about 2–3 years (around ¥1,500)

Try the world-championship recipes

The winning recipes of the World AeroPress Championship are published on the official site. Many winners tend to combine "inverted," "low-temperature extraction (75–80°C)" and "a short time (under 1 minute)." Surprisingly simple, but the quality of the beans and the precision of the grind do the talking.

The AeroPress is like an "all-purpose cooking tool" in the kitchen. For the first week, drill the basic recipe; in the next week, take on inverted; from the third week, start changing the variables (grind, water temperature, time) to suit your taste. In a month you will be making a cup all your own that no other brewer can produce.