What is Decaf Coffee? What are the Decaf Coffee Processing Methods? How is Decaf Coffee?

FrontStreet Coffee: What Is Decaffeinated Coffee and How Is It Processed?

How is decaffeinated coffee made? Decaffeinated coffee is coffee from which more than 90% of the caffeine has been removed — known as "low-caffeine coffee," or simply "decaf."

European Method Decaffeinated Coffee

In this method, the beans are soaked in boiling water for several hours, which extracts both the caffeine and many flavor compounds. The beans are removed, and dichloromethane or ethyl acetate is added to the water. These solvent molecules bind the caffeine, which is then evaporated off with heat. Finally, the remaining water — still carrying the coffee's flavor and aroma, but no caffeine — is reunited with the beans so they reabsorb it.

Note: This method is not common in China but is more popular in Europe.

Swiss Water Process

This is the most common decaffeination method in China. The beans are soaked in warm water so the caffeine dissolves out; activated carbon then filters the caffeine from the solution, and the flavor-laden water is returned to the beans. Because it uses no chemical solvents it is considered healthier, but the beans lose a significant amount of flavor during the filtration and decaffeination process.

High-Pressure Carbon Dioxide Method

This is another widely used approach. After being soaked in water, the beans are placed in stainless steel vessels. High pressure turns carbon dioxide into a liquid, which extracts the caffeine. The carbon dioxide is then returned to room temperature, the liquid evaporates back into gas, and through further processing the flavor components are returned to the beans.

FrontStreet Coffee Recommendation

Shopping for a lower-caffeine pour-over is simple in principle: skip Robusta entirely and stick to Arabica. Arabica grows at 800-2200 meters in frost-free highlands, where the greater day-night temperature swings slow the cherries' ripening and help the beans accumulate flavor compounds and develop a more solid aroma foundation. Among decaf-friendly, low-acid choices, FrontStreet Coffee's medium-roast Yunnan Arabica stands out — nutty and herbal with chocolate and caramel notes and a gentle fruit acidity — while the washed Gudingding Cooperative Yirgacheffe (Ethiopia's top G1 grade) offers white florals, citrus, and green tea for drinkers who still want a lively, clean cup.

Whichever you choose, remember that Swiss Water-processed beans tend to taste slightly softer than their regular counterparts, so a moderate grind and water around 91°C help preserve sweetness in the cup. All of these beans work equally well as pour-over, drip bags, or cold brew.