Why Are My Coffee Beans Oily?
The oil on a dark bean was inside the seed all along. What pushes it out, and why a sheen tells you how long the coffee has been sitting rather than how it was roasted.
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Notes from the roastery: what we buy, how we roast it, and what we have learned building coffee programs on the Gulf Coast.
Tagged “roast levels” · see all of Learn

The oil on a dark bean was inside the seed all along. What pushes it out, and why a sheen tells you how long the coffee has been sitting rather than how it was roasted.

Eight sources publish eight different rest windows, from 12 hours to past two weeks, and three of them blame roast level while disagreeing about which direction it run...

Low acid coffee describes how a cup tastes, not a lower pH. Measured brewed coffee lands between pH 4.85 and 5.13, so here is what actually moves acidity.

Colombian coffee is arabica grown across roughly twenty departments on three Andean ranges. What Supremo and Excelso actually mean, how the cup shifts by region, and w...

A light roast comes off the roaster just after first crack, and it is not stronger: a 2024 study measured 134 to 165 mg of caffeine at every roast level.

Light roasts hold onto the bright acidity, floral aroma and fruit the bean came with. Medium roasts trade some of that for body and balance. Here is what separates the...