A space-age brewer with gravity-defying aspirations, AeroPress was created by the same person who developed the Aerobie (the Frisbee-like things that you can throw nearly two soccer fields) that broke the Guinness world record when it soared 1,333 feet in the air.
AeroPress uses the same aerodynamics and is a specially unique and attractive device for preparing coffee. As a result, it is a favorite among coffee lovers worldwide, and has been a staple in professional coffee shops and home kitchens for the past decade.
For home brewing, AeroPress is a lightweight brewing device that's perfect because it uses pressure and a short brew time if you just want a single cup. We like it because it travels well (like Aerobies) and because it is easy to use.
Here's our proven AeroPress brew method that produces a delicious cup of coffee.
This guide will produce a 7 oz. Cup.
Before You Start Brewing
Make sure your AeroPress is clean and completely dry before using it; otherwise, the plunge tip may not form a perfect seal in the chamber.
For best results, we recommend that you start with the coffee beans and grind them with a grinder immediately before brewing. If you make coffee too quickly, you will quickly lose many compounds that give it aroma and flavor.
Although it may seem complicated, we believe that using a scale makes preparation easier by removing all assumptions from the equation.
What you Need to Brew with an AeroPress
- AeroPress Filters
- AeroPress funnel
- Digital Scale
- Stirring tool
- Coffee cup or other vessel
- 1 - 1:30 minutes
Step 1 - Set up
Using the inverse method, first insert the plunger in the chamber directly under the label 4. Turn the assembly over, chamber side up, and place it on the scale.
Boil 7oz (200 g) of water. Weigh 15-18 grams of coffee (depending on the strength you prefer). Grind to a finer texture than sea salt.
Step 2 - Grind the coffee
The ground coffee grinds should be halfway between the espresso and the drip, similar to a spice or seasoning rub.
Weigh 15 grams of ground coffee into the AeroPress and give it a tap to flatten the coffee evenly. This helps balance the distribution of water when it is poured.
Step 3 - Add a Filter
Insert a paper filter into the AeroPress's detachable plastic cover.
Wet the filter and cover with a little hot water. Here, water has a double function: it helps the filter to adhere to the lid and heats the brewing bowl. This can be a challenge because the water is hot and the cap is quite small: hold the cap with its "ears" and pour the water very slowly to be absorbed by the filter.
Step 4 - Build your AeroPress
Make sure the composition is dry as residual moisture can affect the seal of the device.
Step 5 - Place on the Scale
Place the built AeroPress on your scale with the flared end facing up, then tare the weight. The numbers should appear upside-down at this point. It is possible to correctly assemble the black filter cap and place right-side-up, but this results in leaks and makes precise preparation difficult.
Step 6 - Add Your Coffee
Add the ground coffee. Make sure that no coffee grounds fall into the ring-gutter at the top of the AeroPress chamber.
Step 7 - Start the Timer
Star the time and add twice the weight of water than grounds used (for example, 30 g of water for 15 g of coffee). The water should be about 200 degrees F.
Step 8 - Saturate the Coffee
Make sure the coffee is evenly saturated. If necessary, tamp lightly with a spatula or butter knife and let sit for 30 seconds.
Step 9 Fill the Chamber
Use the remaining hot water to fill the chamber of the AeroPress.
Step 10 - Stir
Stir twice after one minute.
Step 11 - Pressing
Attach the cap and secure it into the grooves tightly. Flip over the entire unit quickly but in control. Once positioned over the AeroPress, begin to apply a slow but steady downward pressure.
You will experience about 20-30 pounds of resistance here. If pressing is too easy, your grind is probably too coarse. If it is very difficult to push, the grind is probably too fine. Your coffee is completely brewed when you start to hear a hissing sound. This means that no water is left to push through the device.
Step 12 - Clean up
Once you have unscrewed the cap, you can pop out the filter and used grounds by simply pressing the inside of the AeroPress a final inch. Then wash and dry each part. The rubber plunger can be cleaned with hot water from the kettle and you are ready for the next preparation.
Final tips for brewing
The degree of extraction of roasting coffee is determined by a series of variables:
- water temperature
When you are comfortable with the brewing method, try slight variations to the variables:
- grind finer and/or use cooler water
- Grind the grounds more coarse and let steep longer
This balancing act ensures there is no right way to do everything ... just use your taste to guide you.
In general, if coffee is thin, hollow, sour, less sweet, it has not been extracted enough. The most effective way to fix this is to make the coffee grounds finer and keep the rest the same.
If your coffee tastes bitter/harsh or astringent, the grinds have been over-extracted. Try coarsening up the grind the next time you go for a brew.
AeroPress is good for maintaining warmth: the polymer used in its construction has very little heat transfer and therefore minimum heat loss. The short brewing time ensures that the temperature throughout the extraction is quite flat compared to drip brew methods which lose heat and benefits from higher water temperatures to keep the extraction temperature high. Try using colder water: 195ºF with a finer grind.
Because AeroPress not only offers thermal stability but also gravity control, this is a great brewing method for experimenting with water temperature, grinding time and extraction.