Running low on sourdough starter? Here are the best verified substitutes, including how to adjust your measurements.

About sourdough starter
A sourdough starter is a live culture of wild yeast and lactic acid bacteria maintained in a mixture of flour and water. It acts as a natural leavening agent, causing bread dough to rise through fermentation while also contributing a characteristic tangy, complex flavour. The starter requires regular feeding to remain active and is the foundation of traditional sourdough baking.
Dietary labels are general guidance based on typical composition. Not a guarantee — see disclaimer.
Best substitute
A mixture of active dry yeast, plain flour, and water can replicate the leavening function of a sourdough starter, though it will lack the sour, fermented flavour. For a closer flavour approximation, add a small amount of apple cider vinegar or plain yoghurt to the dough.
Alternative
Instant yeast combined with flour and water provides reliable leavening and can be used directly without proofing. It produces a lighter, less complex flavour than sourdough starter but works well in most bread recipes where speed is a priority.
| Country | Name |
|---|---|
| FR | levain |
Measurements change across those countries too, not just names — a cup of sourdough starter in an Australian recipe is not a US cup. The kitchen conversion chart covers cup, spoon and oven temperature differences.
Alternative
Baking powder provides chemical leavening and can substitute in quick bread or pancake recipes that call for sourdough starter. It will not replicate the tangy flavour or the chewy crumb structure of true sourdough, but it works well in simpler, faster applications.
Alternative
Kefir is a fermented dairy drink with a tangy flavour and mild leavening properties from its live cultures, making it a reasonable flavour substitute for sourdough starter in pancakes, waffles, and quick breads. It will not provide the same rise as an active starter, so a small amount of additional baking soda is recommended.
Alternative
Plain yoghurt thinned to a pourable consistency with water mimics the acidity and slight tang of sourdough starter and works well in quick breads, pancakes, and flatbreads. Add a small amount of baking soda to activate the acid and provide lift, as yoghurt alone will not leaven a dough.