Instant Yeast vs Sourdough Starter
A side-by-side guide to substituting Sourdough Starter for Instant Yeast (or vice versa).
Use 4.0 tsp of Sourdough Starter for every 1 tsp of Instant Yeast.
Side-by-side
Sourdough Starter
Conversion: Use 4.0× as much (4.0 tsp per 1 tsp)
Tags: vegan
Notes: Use 1 cup active starter to replace 1 tsp instant yeast; reduce other liquids by 1/4 cup. Requires 4–8 hour rise; adds tang.
Read the full guide: Sourdough Starter
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Open calculator →When to use Sourdough Starter instead of Instant Yeast
Use 1 cup active starter to replace 1 tsp instant yeast; reduce other liquids by 1/4 cup. Requires 4–8 hour rise; adds tang. The conversion is use 4.0× as much (4.0 tsp per 1 tsp).
Common questions
Yes — Use 1 cup active starter to replace 1 tsp instant yeast; reduce other liquids by 1/4 cup. Requires 4–8 hour rise; adds tang. Ratio: Use 4.0× as much (4.0 tsp per 1 tsp).
Use 4.0× as much (4.0 tsp per 1 tsp). For other quantities, use the SubSwap calculator.
They are similar in most uses, but Use 1 cup active starter to replace 1 tsp instant yeast; reduce other liquids by 1/4 cup..
Sourdough Starter is one of the options SubSwap lists for Instant Yeast. The 'best' choice depends on your recipe — see the full list of Instant Yeast substitutes.
Looking for more Instant Yeast substitutes beyond Sourdough Starter?
See all Instant Yeast swaps →