The invention relates to mixed crystals comprising a) leavening agents and b) 0.1 to 5000 ppmw, relative to the total amount of leavening agents, of crystallization promoters in the form of at least one polymer, wherein when using hydrophilic cellulose derivatives as crystallization promoters, the amount thereof is reduced to less than 100 ppmw relative to the total amount of leavening agents. The present invention further relates to the production of mixed crystals and to the use thereof in the production of baked goods, as acidity regulators in foods, in the manufacture of cosmetic products, in the synthesis and formulation of pharmaceutical products, and as blowing agents in technical processes such as the manufacture of foam rubber or for fire extinguishing formulations. The present invention further relates to the production of baked goods.
