06/10/2026
Why Red Cherries Matter (and How You Can Taste It in Your Roast)? 🍒
Coffee starts as fruit, and like any fruit, it's best when it's ripe. A coffee cherry turns from green to yellow to deep red as it matures, and in that final stage the sugars inside the fruit and the seed reach their peak. Many producers check this with a refractometer, measuring sugar content in degrees Brix, but on most farms the real tool is a trained eye and a careful hand.
The challenge is that cherries don't ripen all at once. On the same branch you'll find green, yellow, and red fruit side by side, which is why specialty coffee is picked selectively, by hand, with pickers returning to the same trees several times over the harvest. At the mill, cherries are often floated in water too: underripe and damaged fruit tends to float and gets skimmed off, while dense, ripe cherries sink and move on.
All of this effort shows up in your roaster. Underripe cherries produce underdeveloped seeds with fewer sugars and amino acids, the very compounds that drive browning during the roast. These beans stay pale while the rest of the batch turns brown, and we call them quakers. Roast a batch, spread it on a tray, and you'll spot them easily: light tan beans that taste papery, cereal-like, or like raw peanut in the cup.
Picking out quakers after roasting is one of the simplest quality steps a home roaster can take, and it makes a real difference in a light roast where off-notes have nowhere to hide. It's also a quick way to judge a lot. Few quakers in the tray means someone, thousands of kilometres away, only picked the red ones.
Do what you love! 🤎