Brewing Mastery
Brewing Fundamentals
The four fundamental brewing variables: water quality, temperature, steep time, and leaf-to-water ratio. How they interact and how to control each one.
Introduction
Every cup of tea is defined by four interacting variables: {{glossary:water-quality}}, {{glossary:water-temperature}}, {{glossary:steep-time}}, and {{glossary:teapot-ratio}} (leaf-to-water ratio). Understanding how these variables interact is the foundation of all good tea brewing, regardless of method or style.
Variable 1: Water Quality
Since brewed tea is over 98% water, water quality has an outsized impact on flavor. Ideal brewing water contains 50-150 ppm total dissolved solids with a neutral pH (6.5-7.5). Hard water suppresses flavor; distilled water lacks body. Filtered tap water works well for most situations.
Variable 2: Temperature
Temperature controls which compounds extract and how quickly. {{glossary:catechins}} (bitter, astringent) extract rapidly at high temperatures. Amino acids (sweet, umami) extract more evenly across temperatures. Lower temperatures favor sweetness; higher temperatures increase strength and astringency. The correct temperature varies dramatically by tea type — from 50 C for gyokuro to 100 C for black tea and pu-erh.
Variable 3: Time
Steep time determines total extraction. After temperature sets the extraction rate, time determines how far extraction proceeds. Short steeps produce lighter, more aromatic cups; long steeps produce stronger, more tannic cups. Gongfu brewing uses very short times (10-30 seconds) paired with high leaf ratios; Western brewing uses longer times (2-5 minutes) with lower ratios.
Variable 4: Ratio
Leaf-to-water ratio determines concentration. More leaf per unit of water means more concentrated extraction per second of contact. Gongfu ratios (1:15 to 1:20) create intense, focused cups. Western ratios (1:60 to 1:100) produce lighter, more dilute cups.
The Interaction Effect
These variables are not independent — they compensate for each other. You can produce a similarly strong cup by: increasing temperature, increasing time, or increasing leaf ratio. Master brewers adjust all four in concert based on the specific tea, the vessel, and their desired outcome. The key insight is that there is no single correct recipe — only a balanced relationship among the four variables.