Method of roasting coffee beans with a roasting apparatus, said roasting apparatus comprising: - a chamber to contain coffee beans, - a heating device configured to supply hot air to the chamber, - at least one temperature probe to measure the temperature of air supplied by the heating device, - a control system configured to control the heating device and configured to reproduce roasting recipes, said roasting recipes representing the temperature to be applied at discrete successive times t i, respectively, said control of the heating device implementing a feedback loop regulation based on the temperature Treg measured by the at least one temperature probe, wherein, before implementing a new operation of roasting coffee beans with the roasting apparatus by reproducing coffee beans roasting recipes Rset, said roasting recipes R set providing at least a set of points (T set@ti; t i) defined with one specific master roasting apparatus, the feedback loop regulation is adjusted in the roasting apparatus, said operation of adjustment comprising the steps of: - supplying at least one of the conditions Ci of the new operation of roasting in the roasting apparatus, - comparing each supplied condition Ci of the new operation of roasting with the corresponding condition of reference Ci-ref originally applied during the definition of the roasting recipes R set with said master roasting apparatus, - if a difference is identified between said supplied condition Ci of the new operation of roasting in the roasting apparatus and the corresponding condition of reference CiRef in the master roasting apparatus then: - based on said identified difference, getting access to a corresponding pre-determined correction Kci specific to the nature and the difference with CiRef of said condition of roasting, and - applying said corresponding pre-determined correction Kci directly or indirectly to at least one of the temperatures T set@ti of the roasting recipes to be reproduced by the roasting apparatus. - a chamber to contain coffee beans, - a heating device configured to supply hot air to the chamber, - at least one temperature probe to measure the temperature of air supplied by the heating device, - a control system configured to control the heating device and configured to reproduce roasting recipes, said roasting recipes representing the temperature to be applied at discrete successive times t i, respectively, said control of the heating device implementing a feedback loop regulation based on the temperature Treg measured by the at least one temperature probe, wherein, before implementing a new operation of roasting coffee beans with the roasting apparatus by reproducing coffee beans roasting recipes Rset, said roasting recipes R set providing at least a set of points (T set@ti; t i) defined with one specific master roasting apparatus, the feedback loop regulation is adjusted in the roasting apparatus, said operation of adjustment comprising the steps of: - supplying at least one of the conditions Ci of the new operation of roasting in the roasting apparatus, - comparing each supplied condition Ci of the new operation of roasting with the corresponding condition of reference Ci-ref originally applied during the definition of the roasting recipes R set with said master roasting apparatus, - if a difference is identified between said supplied condition Ci of the new operation of roasting in the roasting apparatus and the corresponding condition of reference CiRef in the master roasting apparatus then: - based on said identified difference, getting access to a corresponding pre-determined correction Kci specific to the nature and the difference with CiRef of said condition of roasting, and - applying said corresponding pre-determined correction Kci directly or indirectly to at least one of the temperatures T set@ti of the roasting recipes to be reproduced by the roasting apparatus. - supplying at least one of the conditions Ci of the new operation of roasting in the roasting apparatus, - comparing each supplied condition Ci of the new operation of roasting with the corresponding condition of reference Ci-ref originally applied during the definition of the roasting recipes R set with said master roasting apparatus, - if a difference is identified between said supplied condition Ci of the new operation of roasting in the roasting apparatus and the corresponding condition of reference CiRef in the master roasting apparatus then: - based on said identified difference, getting access to a corresponding pre-determined correction Kci specific to the nature and the difference with CiRef of said condition of roasting, and - applying said corresponding pre-determined correction Kci directly or indirectly to at least one of the temperatures T set@ti of the roasting recipes to be reproduced by the roasting apparatus. - based on said identified difference, getting access to a corresponding pre-determined correction Kci specific to the nature and the difference with CiRef of said condition of roasting, and - applying said corresponding pre-determined correction Kci directly or indirectly to at least one of the temperatures T set@ti of the roasting recipes to be reproduced by the roasting apparatus.