the final material was 6 reduced from 8 in the original paste obtained in example 1 as a result of the centrifugation step in example 3 candida utilis yeast was grown in a continuous fermentor in an aqueous ethanol and minerals medium the resulting yeast broth was concentrated by centrifugation to a yeast cream having a solids concentration of about 15 weight percent viscosity of about 500 cp which was pasteurized heat treated at about 80 u00b0 c for about 11 2 minutes to yield a more fluid slurry the heat treated yeast cream was then concentrated to about 25 weight percent solids by evaporation in a single effect evaporator consisting of a plate and frame type steam heater and a centrifugal vapor liquid separator the concentrated yeast material had a viscosity of about 6 600 cp which is well below the viscosity of a typical 20 weight percent slurry 47 500 cp and very fluid this concentrated material was then spray dried and evaluated for product quality which was not significantly effected by the additional evaporation step used in this process to determine whether this phenomenon occurs with other yeasts about 450 grams of a saccharomyces cerevisiae yeast paste having a dry weight of about 29 percent and a viscosity of greater than 8 000 000 cp was heated in a boiling water bath for 20 minutes and observed as.