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Decaffeination alters the cellular structure of the coffee seed. Because the beans undergo cycles of soaking and drying, they become more porous and brittle than regular green coffee. This physical change directly impacts how the coffee reacts in your grinder and your brewing gear.
- Grind Finer for Espresso: The porous nature of decaf offers less resistance to water. To maintain a standard 25 to 30-second extraction time at 9 bars of atmospheric pressure, you will need to adjust your grinder to a slightly finer setting compared to your standard beans.
- Optimal Brewing Temperatures: For filter setups like a V60 or batch brewer, target a water temperature between 92°C and 94°C. Because decaf extracts highly efficiently, using boiling water can over-extract the grounds, leading to bitterness. A slightly lower temperature highlights sweet notes like fudge brownie and roasted hazelnut.
- Degassing Rates: Decaf coffees degas up to 30% faster post-roast. They hit their optimal brewing window sooner, usually around 7 to 14 days after the roast date.