Why is my coffee too strong?
Too strong means too much coffee for the water. Loosen the ratio (more water per gram of coffee), or just add a splash of hot water to the finished brew. Strength is separate from extraction.
If your coffee is overpowering, heavy, and almost syrupy, you most likely have too much coffee for the amount of water. That is a question of strength, how much dissolved coffee material is in the cup, and it is the easiest thing in brewing to adjust.
Loosen the ratio
Strength tracks your coffee-to-water ratio more than anything else.
- If you are brewing around 1 gram of coffee to 15 grams of water (1:15) and it is too strong, move toward 1:16 or 1:17: same coffee, more water.
- Weigh both if you can. Eyeballing scoops is the usual reason a cup comes out far stronger than expected. The full breakdown is in coffee-to-water-ratio.
Or just dilute the cup
You do not have to rebrew. Adding a splash of hot water to a finished, too-strong brew is a completely legitimate move, this is the principle behind an americano, and the technique is called bypass when you hold some water back from the brew and add it after.
- Add water a little at a time and taste as you go.
- Hot water keeps the cup at drinking temperature; cold water cools it down, which is fine if you prefer that.
Strength is not the same as extraction
This is the part people miss. Strength is how much coffee is in the cup. Extraction is how much flavour you pulled out of the grounds, which controls whether it tastes sour, balanced, or bitter.
- A cup can be strong and still taste sour (strong but under-extracted).
- A cup can be light and still taste bitter (weak but over-extracted).
So if your coffee is strong and harsh, loosen the ratio to fix strength, but you may also need to grind coarser to ease the over-extraction. The two dials are independent. Understanding strength as its own thing, separate from the four brewing dials, is what lets you tune a cup precisely instead of guessing.