a mixing and kneading arrangement has a kneading vat and at least one kneading tool . a spray device in the arrangement has at least one spray nozzle in order to produce a spray mist in the kneading vat . furthermore , the spray device has a feeding device for feeding liquid or liquefied dough components into the spray nozzle . the spray device furthermore has a source for gas which contains oxygen and a pressure unit , which sets the gas which contains oxygen under pressure . in a spray head in the spray nozzle , the liquid or liquefied dough components are combined with the gas which contains oxygen and which is under pressure to produce the spray mist .