Active Dry Yeast vs Sourdough Starter
A side-by-side guide to substituting Sourdough Starter for Active Dry Yeast (or vice versa).
Use 4 tsp of Sourdough Starter for every 1 tsp of Active Dry Yeast.
Side-by-side
Sourdough Starter
Conversion: Use 4× as much (4 tsp per 1 tsp)
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Notes: Replace 1 tsp yeast with ½ cup active sourdough starter. Also reduce flour by 1 cup and liquid by ½ cup. Gives complex flavor but requires planning.
Read the full guide: Sourdough Starter
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Open calculator →When to use Sourdough Starter instead of Active Dry Yeast
Replace 1 tsp yeast with ½ cup active sourdough starter. Also reduce flour by 1 cup and liquid by ½ cup. Gives complex flavor but requires planning. The conversion is use 4× as much (4 tsp per 1 tsp).
Common questions
Yes — Replace 1 tsp yeast with ½ cup active sourdough starter. Also reduce flour by 1 cup and liquid by ½ cup. Gives complex flavor but requires planning. Ratio: Use 4× as much (4 tsp per 1 tsp).
Use 4× as much (4 tsp per 1 tsp). For other quantities, use the SubSwap calculator.
They are similar in most uses, but Replace 1 tsp yeast with ½ cup active sourdough starter..
Sourdough Starter is one of the options SubSwap lists for Active Dry Yeast. The 'best' choice depends on your recipe — see the full list of Active Dry Yeast substitutes.
Looking for more Active Dry Yeast substitutes beyond Sourdough Starter?
See all Active Dry Yeast swaps →