The verdict, up front: the recipe below — 17 g of medium-ground coffee, 250 g of water just off the boil, a 90-second steep and a slow 25-second press — makes a strong, clean, sweet mug and is the only AeroPress recipe most people ever need. Learn it exactly as written for a week before changing anything, because the reason AeroPress advice is so confusing online is that everyone is adjusting from a different starting point. This is a starting point.
It helps to know what an AeroPress actually is, because it is two brewers in one and the arguments about it come from people describing different halves. For the first 90 seconds it is an immersion brewer, like a French press: the coffee sits in the water and extracts gently. Then you press, and it becomes a pressure brewer: your hand forces the water through a paper filter in under half a minute. The immersion gives it body and sweetness; the paper filter takes out the oils and the fine sediment that make French press coffee heavy. That combination is why a $40 plastic tube makes a cup that embarrasses a lot of expensive machinery.
What it is not is an espresso maker. The pressure from a human arm is a fraction of what an espresso machine’s pump delivers, so an AeroPress “espresso” is a small, intense, concentrated coffee rather than a true shot — excellent in its own right, and the base for a very good Americano, but it will not produce real crema. If what you want is espresso, portable espresso makers is the right page.
What you need
- The AeroPress and its paper filters. The filters are consumable, cost almost nothing and are worth keeping a spare pack of.
- A kettle. Any kettle. A gooseneck is a nice thing to own for pour-over and makes no difference here, because you are filling a chamber rather than pouring over a bed.
- Medium-ground coffee. Ground that morning if at all possible.
- A scale, ideally. Not essential — a level AeroPress scoop is close to the right dose — but it is what turns “that was a good one” into a recipe you can repeat.
The recipe, step by step
1. Boil the kettle and let it settle
The National Coffee Association's brewing guidance is water at 93 ± 3°C — about 194 to 205°F. Off the boil and a minute of standing lands in that window without a thermometer.
2. Rinse the paper filter in the cap
Drop one paper filter into the cap, screw it onto the chamber and pour a little hot water through into your mug. This washes out the papery taste and warms the mug. Tip the water away.
3. Weigh 17 g of medium-ground coffee into the chamber
Medium grind — the NCA's comparison for drip and pour-over is "like kosher salt". Stand the chamber (cap on, filter in) on the mug.
4. Pour 250 g of water and start a timer
Pour to the top of the grounds first, wait ten seconds for the bloom, then fill. 250 g of water is 250 ml — the density of water is roughly 1 gram per millilitre, which is why coffee recipes can treat the two as the same number.
5. Stir once, then insert the plunger
Ten seconds of gentle stirring, then push the plunger in just far enough to seal. That seal stops the water dripping through while it steeps.
6. At 1:30, press slowly
Twenty to thirty seconds of steady, even pressure. If it is hard work, the grind is too fine. If the plunger drops with no resistance, it is too coarse.
7. Stop at the hiss
When you hear air, stop pressing — squeezing the last drops out is where the bitterness lives. Unscrew the cap over a bin and push the puck out in one motion.
Total elapsed time from a boiled kettle: about two and a half minutes. Total cleanup: unscrew the cap, push the puck into the bin, rinse the plunger under the tap. That last part is the quiet reason people who own expensive brewers still use an AeroPress on weekdays.
The inverted method, and whether you need it
Inverted brewing means assembling the press upside down — plunger at the bottom, open chamber at the top — adding coffee and water, letting it steep with nothing to drip through, then screwing on the filter cap, flipping the whole thing onto the mug and pressing. It exists to solve one problem: in the standard orientation, a little water starts draining through the filter the moment you pour, so the steep is slightly uneven.
Does it matter? Honestly, only a little, and the standard method with the plunger inserted early (step 5 above) gets you most of the way there by sealing the chamber. The inverted method does give you complete control over the steep time, which is useful if you are experimenting with long steeps.
It also has a real downside worth stating plainly: a full, hot, upside-down press has to be flipped onto a mug, and if the cap is not screwed on firmly the whole thing can let go. Do not teach it to a child, do not do it one-handed, and do not do it over bare feet. For a gift recipient who is new to the brewer, write the standard recipe on the card and leave the inverted method for later.
Fixing a cup that is not right
Change one variable at a time, and change the grind before anything else — it is the biggest lever you have.
- Thin, sour or watery. Under-extracted. Grind finer first. If that is not enough, extend the steep to two minutes, or use slightly hotter water.
- Bitter, harsh or drying. Over-extracted. Grind coarser, shorten the steep, and make sure you are not squeezing the last drops out at the end of the press.
- Not strong enough, but tastes fine. That is a ratio problem, not an extraction problem. Keep everything the same and use 20 g of coffee instead of 17, or 220 g of water instead of 250. Our coffee-to-water ratio guide has the arithmetic.
- The press is very hard work. The grind is too fine for the paper. Go coarser. Forcing it is how people break the seal and splutter coffee over the counter.
- The plunger drops straight down with no resistance. Too coarse, and the cup will taste weak and sour. Go finer.
- Everything is right and it still tastes flat. The coffee is stale. The NCA puts roasted whole beans at roughly one to three weeks at room temperature and ground coffee at one to two, so a bag ground a month ago is the problem, not your technique.
The two upgrades that actually change the cup
An AeroPress needs nothing. But if you are buying one as a gift or adding to a setup, there are exactly two things worth spending money on, and neither of them is a different AeroPress.
The first is a grinder. Every fault in the list above is diagnosed by changing the grind, which is impossible with pre-ground coffee — you get one grind size and no way to move it. A hand grinder is all this brewer needs, costs less than most people expect, and travels with it.
The second is a scale, and it is cheaper than it sounds. A scoop of coffee can vary by several grams depending on how coarsely it was ground and how it was scooped, which is enough to swing a 17 g dose by a noticeable amount. Weighing turns a lucky cup into a repeatable one. Both picks below are 0.1 g scales with a built-in timer, which is all a brew scale needs to be.
