Lipids in Coffee
The role of coffee oils and lipids in aroma, mouthfeel, extraction and brewing.
Coffee oils
Coffee contains lipids that contribute to the physical properties of roasted coffee and can carry or influence aroma compounds.
Filter papers and oils
Paper filtration can retain a substantial portion of coffee oils compared with brewing methods that allow more fine particles and oils into the beverage. This is one reason filter coffee can have a different mouthfeel from French press or espresso.
Storage implications
Lipids are susceptible to oxidation. Oxygen exposure and time can contribute to stale or rancid sensory notes as coffee ages.
Not all oils are the same
The visible sheen sometimes seen on dark-roasted beans is not a direct measure of flavour quality or freshness. Roast degree, bean structure and storage history all matter.
Continue exploring
Green coffee
Follow coffee from plant and cherry through processing, drying, milling and storage.
Green coffee →Coffee chemistry
Explore the compounds and reactions that shape roasted coffee.
Coffee chemistry →Coffee extraction
Connect grind, water, temperature, time, concentration and extraction.
Coffee extraction →Coffee Knowledge presents technical subjects as an educational reference. Terminology, grading systems and production practices can vary by country, producer, equipment and commercial context.