Process for packaging a fluid food product (1 ), such as a beverage or a soup, containing solid pieces (3), comprising the steps of: boiling under high pressure a first fluid mixture (2) formed from said solid pieces (3) and a first fluid (4) lowering the temperature of the first fluid mixture (2) evacuating a part of the steam predisposing a UHT treatment of a second fluid (5) and then cooling the second fluid (5) to a temperature lower than 60°C once the second fluid (5) has cooled, introducing a pre-established quantity thereof into the first fluid mixture (2) so as to obtain said fluid food product (1) introducing a pre-established quantity of said fluid food product (1) into a PET container (15).
