tags: [] - coffee/brewing - coffee/brewing/science aliases: - Coffee brewing process - The coffee making process - How coffee is made

Coffee Making Process¶

Tags: #coffee/brewing #coffee/brewing/science Aliases: Coffee brewing process, The coffee making process, How coffee is made Related: Coffee Extraction Fundamentals MOC | Brewing Methods MOC | Extraction Variables | Brew Ratio | Coffee Extraction Status: ✅ Complete

Overview¶

The coffee-making process is the transformation of roasted coffee beans into a brewed beverage through the controlled extraction of soluble compounds using water. Coffee brewing is fundamentally an extraction process: hot water acts as a solvent to dissolve flavour compounds from ground coffee, and the goal is to achieve balanced extraction — pulling sufficient soluble material to create flavour complexity while avoiding over-extraction of bitter compounds. Every brewing method applies the same underlying chemistry through a different physical mechanism.

The Three Essential Elements¶

Every coffee-making process requires three components:

Ground coffee — Roasted beans reduced to a consistent particle size to increase surface area for extraction
Hot water — The solvent that extracts flavour compounds; typically 90–96 °C for most methods
Time — The duration of contact between water and coffee grounds; the primary secondary control after grind size

Key Variables¶

Brewed coffee quality and character depend on controlling several interacting variables:

Variable	Effect	Typical range
Grind size	Finer = faster extraction, slower flow; coarser = slower extraction, faster flow	Coarse (French press) to fine (espresso)
Water temperature	Higher temperatures extract faster and draw more compounds	90–96 °C
Brew time	Longer contact increases extraction yield	Method-dependent
Coffee-to-water ratio	Determines concentration (strength)	1:15 to 1:17 by weight (filter)
Agitation	Stirring or turbulence increases extraction rate	Technique-dependent
Water chemistry	Mineral content affects extraction efficiency and flavour	SCA target: 75–150 mg/L TDS

Extraction Phases¶

Extraction occurs in a predictable sequence as different compound classes dissolve at different rates:

Acids and light aromatics — Extract first; contribute brightness, fruit notes, and acidity
Sugars and balanced flavours — Extract in the middle phase; contribute sweetness and body
Bitter compounds (phenolics, tannins) — Extract last; contribute bitterness and astringency if over-extracted

The SCA target extraction yield is 18–22% of the dry coffee mass. Below this range, the cup presents as sour, thin, or under-developed; above it, as bitter or astringent.

Connection to Roasting¶

The coffee-making process realises the flavour potential developed during roasting. Roasting transforms green coffee's starchy, acidic compounds into the hundreds of flavour-active molecules — acids, sugars, melanoidins, volatile aromatics — that brewing subsequently extracts. The character of the roast determines what is available to extract; the brewing process determines what proportion is successfully dissolved into the cup.

Key Facts¶

Brewing is fundamentally a controlled dissolution process; the goal is to dissolve the right proportion (18–22% EY) of the coffee's soluble mass
Grind size is the most powerful extraction variable, controlling both surface area and diffusion path length
Water temperature standard for most methods: 90–96 °C; lower temperatures slow extraction, higher temperatures can over-extract bitter compounds
Extraction yield and brew strength (TDS) are independent variables controlled by different parameters
All brewing methods use the same underlying chemistry; only the mechanism of water–coffee contact differs

References¶

Changelog¶

Date	Change
2026-05-02	Compliance review: full rewrite — original had `%%...%%` comment block, `05_PUBLISHING/` and `../` wikilinks, Fahrenheit parentheticals, American spellings; rebuilt as encyclopedia article

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