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Coffee tastes too strong

The cup feels overly intense or concentrated, distinct from tasting outright bitter.

Applies to: V60 (pour-over), French press, Moka pot

Too strong, or too bitter?

CoffeeHQ explanation

Strong coffee has a lot of dissolved coffee in each mouthful. It is caused by the ratio: too much coffee for the water, or too little water for the coffee. Nothing has gone wrong with the extraction, and the flavours may be perfectly good underneath.

The quickest test is dilution. Add a little hot water to the cup. If it becomes pleasant, the brew was simply too concentrated and you can either keep diluting or change the recipe. If it is still harsh, strength was not the whole story and the cup belongs with bitterness.

Adding water after brewing is a legitimate technique and not a bodge. It lowers the strength without changing what was extracted, which is exactly how an americano is made, and it is often easier than rebuilding a recipe.

Causes, most likely first

There are 2 likely causes, listed with the most probable first. Work down the list and change one thing at a time, so that when the problem goes away you know which change fixed it.

  1. Cause 1 of 2 · Commonly the cause

    Coffee-to-water ratio too high

    How to check
    Have you weighed both coffee and water recently, or changed your usual amounts?
    What to change
    Reduce the coffee dose relative to water, or add a little more water after brewing.

  2. Cause 2 of 2 · Reported, not independently verified

    Serving size smaller than the ratio was designed for

    What to change
    Check whether your usual ratio assumes a larger cup than you're currently using.

If none of these fixes it

Check the cleaning and descaling guide. Equipment that needs maintenance can cause several of these symptoms at once, and no change of recipe will correct it.

Work through it for your setup

The causes above are general. These go to the part of a diagnostic that takes this symptom one check and one change at a time.

  1. Make my coffee betterChoose your brewer and tick what you noticed
  2. Coffee-to-water ratio calculator

How it shows up on different brewers

Tendency, not a guarantee

Filter and French press
Use less coffee for the same water, or simply top up the finished brew with hot water until it suits you.
Espresso
Let the shot run a little longer for a lighter-bodied drink, or add hot water for an americano. Do not reduce the dose below what the basket is made for.
Moka pot
The ratio is fixed by the pot, so the brew is always strong. Dilute it in the cup; under-filling the basket causes other problems.
Cold brew concentrate
It is meant to be diluted. Add water or milk in stages and taste as you go.

Easily confused with

  • Bitterness from over-extraction — A cup that stays harsh and drying after you dilute it is more likely over-extracted. Changing the ratio further is unlikely to help; try the grind or the brew time next.
  • A very dark roast — Dark roasts taste intense and smoky at any strength. That is the character of the roast and not a fault in how it was brewed.

What not to change at the same time

Do not reduce the coffee and coarsen the grind together. Both weaken the cup, and the coarser grind can leave it sour as well as weaker.

How to tell it is fixed

The same flavours should still be there, with room between them. If thinning the cup made it taste empty and not merely lighter, you have gone too far.

Understand the science: Coffee-to-water ratio — How the ratio sets strength, and which way to move it for a weaker or stronger cup.

Related issues

What to change

Specific adjustments for this symptom, with what each one trades off.

Work it out

Interactive tools that take you through this one change at a time.

Related guides