What does it mean when beans appear oily or wet?

What does it mean when beans appear oily or wet?

When you open up a bag of coffee?  pick up a small handful of beans. Are they glossy or matte in appearance?  

As you roast a coffee you break down the cell structure of the bean, releasing CO2. When the CO2 comes into contact with oxygen, it creates a chemical reaction that leaves behind the oily or wet appearance that we can sometimes see on the bean.

Though oxidation is a natural process, and will happen over time with all coffees; the oily sheen will appear more quickly as the result of a high-heat and/or high-duration roast (typically used to achieve a dark roast). This is not a sign that the coffee seed was of a lower quality (but that it is either a darker roast or has been sitting on a shelf for a while.) These oils, like all oils, have the potential to go rancid over time, causing a sour flavor in your coffee, but that could take a while.

At Progeny we’re committed to showcasing the best single origin, micro-lot, coffees from Colombia. Coffees which have been roasted perfectly to showcase their balance while highlighting what makes each coffee unique. We find that this is usually achieved by a light to medium roast. This means that most of our coffees will arrive at your home without an oily sheen on our beans.

Older Post
Newer Post
Close (esc)


Use this popup to embed a mailing list sign up form. Alternatively use it as a simple call to action with a link to a product or a page.

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.

Shopping Cart

Your cart is currently empty.
Shop now