By circulating chilled glycol through a cooling jacket the dough temperature can be kept stable. A chilled glycol solution is pumped through the jacket to keep the mixer bowl cool. Another option is to use a water cooled jacket. This ensures that the dough is kept at the proper temperature during the entire mixing process. A jacket is an external cover that is added to a mixer that permits the uniform exchange of heat between the fluid circulating in it and the walls of the mixer.
The final temperature of the dough before it is set to rise will determine the density of the baked good. The maturation of the yeast during “resting” is a direct result of the dough temperature.