Brewlab.

The Brewlab journal

The ideal water temperature for pour-over, by roast level

18 June 2026 · 6 min read · Lena Hartmann

The ideal water temperature for pour-over, by roast level

Light, medium and dark roasts extract best at different temperatures. We tested all three against a calibrated thermocouple to find the actual numbers.

Cold brew ratio: 1:8 or 1:12? We tested both for 18 hours

29 July 2026 · 7 min read

Cold brew ratio: 1:8 or 1:12? We tested both for 18 hours

Cold brew recipes disagree wildly on ratio. We steeped the same beans at 1:8 and 1:12 for 18 hours in a Cold Brew Carafe and measured the difference.

Why a calibrated tamper matters (and when it does not)

5 October 2026 · 5 min read

Why a calibrated tamper matters (and when it does not)

A calibrated tamper fixes one specific extraction problem. We break down exactly which espresso issues it solves, and which ones it can't touch.

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