pkg dry active yeast
Dry yeast is a source of B vitamins (particularly B1, B2, B3, and B9) and contains trace minerals including selenium and chromium. It contributes minimal calories to finished baked goods due to the small quantities used and nutrient depletion during fermentation.
About
Dry active yeast is a leavening agent consisting of dormant cells of the fungus Saccharomyces cerevisiae that have been processed to remove moisture, extending shelf life and stabilizing viability. The yeast cells are dehydrated through a standardized process and typically packaged in individual sachets or larger containers. When rehydrated in warm liquid with nutrients (sugar and water), the yeast cells become metabolically active, fermenting sugars to produce carbon dioxide gas and ethanol—the primary mechanisms of leavening in bread and other fermented baked goods.
The granular texture consists of dead yeast cells mixed with living cells and naturally occurring yeast metabolites. Dry active yeast differs slightly from instant yeast (which has smaller particles and faster hydration) but is functionally equivalent to bread machine yeast. Properly stored dry active yeast remains viable for several years when kept cool and dry.
Culinary Uses
Dry active yeast is the primary leavening agent in bread baking, including artisan breads, sandwich loaves, rolls, and sweet doughs. It is also used in pizza dough, bagels, pretzels, and various fermented pastries across European and North American baking traditions. The yeast requires activation (blooming) in warm water before being incorporated into dough, allowing bakers to verify viability and ensure proper fermentation rates. In addition to baking, dry active yeast is employed in brewing, winemaking, and the production of other fermented foods and beverages. Proper hydration temperature (typically 105–110°F/40–43°C) is critical; excessive heat kills the yeast, while cold temperatures slow activation.