Bed depth: why it matters

Scott Rao · 11 Nov 2025 · scottrao.com ↗

2 korrents from this piece

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Every claim below was made in this piece, quoted word for word and numbered in the order the piece makes them, so you can read it there rather than take our word for it. The sentence above each quote is our reading of the claim, not their wording. Each quote was checked against a stored copy of the page at build time; where the two differ, the quote is the fact.

Our reading
Brewing coffee with too deep a bed forces a coarser grind, which lowers extraction efficiency and wastes coffee grounds.

Their wordsIf a bed is too deep, one has to use a very coarse grind. The result in the cup may or may not be good enough, but the extraction level will be low, which is inefficient, in the sense of wasting coffee material.
Our reading
In coffee brewing, channels that reach the bottom of the coffee bed carry astringency-causing compounds into the cup.

Their wordsChannels that manage to reach the bottom of a coffee bed carry larger, astringency-causing compounds out of the bed and into the cup.