Exploring the everyday science behind brewing and infusion.
Why smaller or larger pieces behave differently in water.
Grind size changes more than people think Coffee grind often gets treated like a small detail, but it changes the whole way water behaves around the grounds. A finer grind is not just "smaller." It means the coffee has been broken into more pieces, and that changes how much of it is exposed to water …
Coffee bitterness often gets blamed on the bean, the roast, or the water. Those factors matter, but grind size sits much closer to the mechanism that actually creates the cup. It changes how much of the surface is exposed, how quickly water moves through the grounds, and how long different compounds remain in contact with …