The invention concerns a process for preparing a tea in a drinking receptacle with a tea brewing machine, said machine being configured : - to brew tea from a capsule, said capsule comprising tea leaves, by introducing hot water in said capsule and dispensing brewed tea from the capsule in the drinking receptacle, and - to pump and heat water and dispense hot water to the capsule, wherein said process comprises a step of pasteurization of tea leaves inside the capsule before dispensing brewed tea from the capsule inside the drinking receptacle, wherein said pasteurization step comprises the sub-steps of : p1) - introducing hot water in the capsule until all the tea leaves are submerged by hot water inside the capsule and stopping water introduction before tea is dispensed therefrom in the drinking receptacle, then p2) keeping all the tea leaves submerged in hot water during a period of time, wherein the temperature of hot water introduced in sub-step p1) and the sum of the periods of time of sub-steps p1) and
