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

About instant dry yeast
Instant dry yeast is a fine-grained, dehydrated form of Saccharomyces cerevisiae that can be added directly to dry ingredients without prior activation in water. It contains a higher concentration of live yeast cells than active dry yeast, resulting in faster and more reliable rises. Its convenience and consistent performance make it the preferred choice for most home bakers.
Best substitute
Active dry yeast works in the same way but has larger granules and a lower concentration of live cells, so it must be proofed in warm water (around 40°C) before use to ensure viability. It produces the same flavour and structure but rises slightly more slowly.
Alternative
Fresh yeast, also called compressed or cake yeast, is highly active and produces excellent rise and flavour. It has a much higher moisture content so a larger quantity is needed, and it should be crumbled and dissolved in warm water before adding to the dough. It has a short refrigerator shelf life of about two weeks.
Alternative
Baking powder is a chemical leavener that produces CO₂ through an acid-base reaction rather than fermentation, so it works instantly without any rise time. It lacks the complex flavour that yeast fermentation develops and is best suited to quick breads and batters rather than yeasted breads.
| Country | Name |
|---|---|
| Australia | instant dry yeast |
| Canada | instant yeast |
| New Zealand | instant dry yeast |
| United Kingdom | fast-action dried yeast |
| United States | instant yeast |
Alternative
An active sourdough starter contains wild yeast and lactic acid bacteria that leaven bread through slow fermentation, producing a distinctly tangy, complex flavour. It requires a much longer fermentation time and the recipe must be adjusted for the added liquid and flour from the starter itself.
Alternative
A combination of baking soda (bicarbonate of soda) and an acid such as lemon juice, vinegar, or buttermilk creates a rapid chemical leavening reaction. This substitute produces no fermented flavour and works only for quick-style breads and batters, not traditional yeasted breads.