Dose & ratio

Every recipe in Blend carries a ratio like 1:15 or 1:16.7. Read it as grams of water per gram of coffee: 30 g of coffee at 1:16.7 means 500 g of water. That single number is the main control over strength — how concentrated the cup feels on your tongue.

The filter-coffee window runs roughly 1:15 to 1:17. Tighter ratios (1:12) drink thick and intense; looser ones (1:18) drink light and tea-like. Neither is wrong — but everything else in a recipe assumes you hit the ratio it was written for, which is why the scale came before every other purchase.

Dose and ratio scale together. 15 g at 1:16.7 brews the same strength cup as 30 g at 1:16.7 — just half as much of it. Change the dose when you want more coffee; change the ratio when you want different coffee.

And here is the fix this lesson buys you: when a cup tastes balanced — not sour, not bitter — but simply too intense, the answer is more water, not a different grind. Strength and extraction are different dials, and the ratio is the strength dial.