I drink coffee, from a stovetop moka pot. I do not add anything to it. No milk, no sugar, no water. Just the output of the moka pot is drunk, by me (not sure, if that is the norm).

I have read in some places, including other questions in this SE, that to reduce acidity, one must allow water to be in contact with coffee, for a longer duration.

I have tried to reduce the flame, as soon as the coffee starts pouring into the top part of the moka pot, to increase the time of brewing. However, this only seems to marginally decrease the acidity.

The coffee also doesn't seem strong enough. Is there any way to increase strength, and decrease the acidity?

A better way of doing what I tried is also appreciated.

PS: I am looking for ways to archive result by changing brewing methods, and not means.

  • Are we talking about the setup in your newer question? If yes, are you filling up the grounds chamber flush? Have you checked the grind? What kind of roast are you using?
    – Stephie
    Jan 6, 2021 at 21:44
  • And could you please check how much coffee (ideally in gram) and how much water your setup uses?
    – Stephie
    Jan 6, 2021 at 22:22
  • Yes the same device I mentioned in my newer question. Halfway full. Water is also halfway full. Medium roast, coarse grind. Will check measurements, by weekend (not possible earlier).
    – Manish S
    Jan 7, 2021 at 2:37
  • I edited the question replacing percolator with moka pot.
    – Manish S
    Jan 7, 2021 at 2:41
  • @Stephie I use about 300ml of water, in the lower chamber. And, 2 teaspoon (piled up) of coffee gains.
    – Manish S
    Jan 7, 2021 at 16:32

3 Answers 3


Both issues you're describing, high acidity and weak body, are most probably a result of under-extraction. To increase the balance of the brewed coffee and get a more intense body by increased extraction you have several choices:

  1. Longer brew time. As you said, this is difficult to achieve with a moka pot.
  2. Increased temperature. This is also practically uncontrollable with a moka pot.
  3. Grind finer. This is probably the variable which has the most effect on your brew. If you grind finer, you get more surface area and higher extraction (all else being equal of course). Keep in mind this will make your coffee less acidic but also more bitter.

In general, a moka pot doesn't allow for much customization and precise adjustments. The only thing I can strongly recommend is to keep everything you're doing the same from brew to brew and only adjust the grind size.

If you don't own a grinder and use pre-ground coffee I'm afraid you're out of luck. Getting a cheap-ish hand grinder (usable and consistent hand grinders are available for 30-50$/€) and using freshly ground beans instead of pre-ground coffee is an upgrade I strongly recommend.

If you're interested in deeper exploration of coffee you can check out this video with 2007 World Barista Champion James Hoffman about how to make a good cup of coffee with a moka pot. He also has a lot of videos his main channel about coffee.

  • Thank you. I grind it myself. I'll try to make it with finer grind. My observation is that, on a moka pot, when moderators is increased, the brew time decreases. So, there should be a temperature, at which the result of both combined will have the most intense coffee, right? Any idea on how to calculate that?
    – Manish S
    Jan 7, 2021 at 16:30
  • In a comment the OP states that they fill the Moka only half, this is in my experience a big no-no, given that a Moka is designed for a fixed ratio.
    – Stephie
    Jan 7, 2021 at 16:51
  • @ManishS What do you mean with moderators? What exactly is being increased and what do you want to calculate? Jan 7, 2021 at 23:02
  • @technical_difficulty, it was temperature and not moderators. It was a typo. Sorry about that. (For some reason, I am unable to edit that comment.)
    – Manish S
    Jan 8, 2021 at 1:54

Mokas are designed for a fixed water / coffee ratio, given by the volumes of the respective chambers. As a baseline, you should always fill up both, for the water until just below the valve or to the given fill line (if your pot has it), the grounds chamber gets filled up to the top, but not tamped or compacted (or only ever so slightly).

That leaves mostly grind size and to a far lesser degree brewing time as parameters. Aim for a comparatively fine grind - finer than for pour-over, a bit coarser than for espresso. Try to go down with the grind size until you start to see some dust at the bottom of the upper chamber, but not so fine that it clogs up. As you have a largely fixed and rather short extraction time, coarse ground coffee won’t be extracted well, giving you an under extracted brew.

Some coffees, especially lighter roasts that have a more acidic and floral notes, are not ideal for a Moka. But assuming that you are using the same coffee as in your other post, a full chamber should be a good first step, the half-full chamber means you don’t get the desired pressure in the setup and an underextracted (-> weak and acidic) brew.

  • Filling up both would give a lot more coffee, right? I want only one cup. Any possible workarounds?
    – Manish S
    Jan 7, 2021 at 17:15
  • Some Mokas have a horizontal divider for the coffee chamber. But the results are usually not quite the same as for the full setup. The standard workaround is to get a Moka that fits your needs, some families have multiple sizes. I have two, a 2 cup and a 6 cup one. (Note that the “cups” in a Moka are 60ml, not the US “cup” of 236 ml.)
    – Stephie
    Jan 7, 2021 at 17:21
  • Or you could always look into other brewing methods in general, e.g. pour over?
    – Stephie
    Jan 7, 2021 at 17:22

Grind fine as you can. Use little less water. Brew for longer. Don’t boil water, maybe try & bring temperature down using a food/meat/milk thermometer probe.Experiment with all these in small increments & failing that try a darker roasted coffee. Kenya & Tanzania coffees tend to be most acidic especially when lightly roasted.

  • Ps also always try & use filtered water if you can Jan 7, 2021 at 19:26
  • The “brew for longer” would require a different setup? The asker is using a moka pot.
    – Stephie
    Jan 7, 2021 at 20:42
  • @technical_difficulty recommends higher temperature. Lee Stephenson recommends lower temperature. What would produce desired results?
    – Manish S
    Jan 8, 2021 at 1:58

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.