yeast cakes
Yeast cakes are negligible in calories but contain B vitamins (thiamine, riboflavin, niacin) and trace minerals from the yeast cells themselves; however, amounts consumed per serving are too small to provide significant nutritional contribution.
About
Yeast cakes, also called fresh yeast or compressed yeast, are concentrated colonies of living Saccharomyces cerevisiae (baker's yeast) pressed into compact, moist blocks or cakes. Originating from fermentation byproducts of beer and wine production in medieval Europe, modern yeast cakes are cultivated and compressed into uniform portions, typically pale tan to cream-colored with a dense, crumbly texture. Each cake contains billions of yeast cells suspended in a starch binder, remaining metabolically active if stored properly.
Flavor-wise, yeast cakes are relatively neutral with subtle earthy, slightly sweet undertones. The potency of fresh yeast cakes is measured in terms of leavening power per unit weight, which is considerably stronger than dry yeast due to higher moisture content and cell viability. Most commercial cakes contain no additives beyond the binder.
Culinary Uses
Yeast cakes are the primary leavening agent in bread, pastry, and cake production, prized by professional and home bakers for their rapid fermentation activity and reliable rising power. They are dissolved or crumbled into dough to activate fermentation, producing carbon dioxide gas that creates structure and volume. Traditional applications span European bread baking (sourdough, focaccia, brioche), Eastern European sweet breads (babka, kulich), and pastry work requiring precise fermentation timing. The moist nature of yeast cakes allows for quick blooming and integration into dough.