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.