A process of preparing a capsule comprising a ground coffee ingredient, the process comprising the steps of:(a) cooling a coffee ingredient to a temperature of −50° C. to 10° C.(b) grinding the coffee ingredient, optionally wherein the coffee ingredient is cooled during grinding(c) filling the coffee ingredient into a first capsule element, optionally wherein the coffee ingredient is cooled during filling(d) hermetically sealing the first capsule element with a second capsule element, optionally wherein the coffee ingredient is cooled during sealing.