Running low on active dry yeast? Here are the best verified substitutes, including how to adjust your measurements.

About active dry yeast
Active dry yeast is a dehydrated form of Saccharomyces cerevisiae in which the yeast cells are dormant and encased in a protective shell of dead cells. It must be rehydrated (proofed) in warm water before use to activate the living cells within. It is a reliable leavening agent that produces carbon dioxide through fermentation, giving bread and other baked goods their rise and characteristic flavour.
Best substitute
Instant yeast (also called rapid-rise or bread machine yeast) contains finer granules with a higher proportion of live cells, so it works faster and does not need to be proofed first — it can be mixed directly into dry ingredients. It is the closest substitute and produces nearly identical results.
Alternative
Fresh yeast (compressed yeast) is undried and contains a very high proportion of active cells, giving a slightly richer, more complex flavour. It is more perishable but highly effective; crumble it directly into warm liquid to dissolve before using.
Alternative
| Country | Name |
|---|---|
| Australia | active dry yeast |
| Canada | active dry yeast |
| New Zealand | active dry yeast |
| United Kingdom | dried yeast |
| United States | active dry yeast |
A sourdough starter is a live culture of wild yeasts and lactic acid bacteria that leavens bread through fermentation. It imparts a distinctive tangy flavour and requires a much longer fermentation time. As a rule of thumb, replace each 7 g sachet of active dry yeast with about 100 g of active starter and reduce the flour and liquid in the recipe accordingly.
Alternative
Baking powder is a chemical leavening agent that produces carbon dioxide when moistened and heated, providing lift without fermentation. It produces a quicker, more tender crumb but none of the yeasty flavour or chewy texture associated with yeast-leavened breads. Best suited to recipes such as soda bread, muffins, or pancakes where yeast flavour is not essential.
Alternative
A combination of bicarbonate of soda and an acid (such as lemon juice, vinegar, or buttermilk) creates a rapid chemical leavening reaction similar to baking powder. This produces lift but no fermentation flavour; the ratio below refers to bicarbonate of soda, which should be paired with twice the volume of an acid such as lemon juice or white vinegar.