The final response model equation was derived (Eq. (2)) and the response surface for this equation (Fig. 1) shows that the melting point tends to decrease when intermediate fermentation times were reached and formed a cell point between four and five hours of the fermentation process. At this time-point, it also appears that the fat concentration of the medium significantly contributes (linearly) to the observed phenomena as the level curves at this point have a near null slope.