Yeast Water Starters
Starters using fermented fruit water instead of plain water are a wonderful alternative to a traditional flour and water based Starter. Fruit such as apples, grapes and plums, work really well.
You often get a nice hint of the fruit you used in your starter though not always in the final bake.
Almost any edible, non-toxic fruit or vegetable will make yeast water, except for those which contain actinidain* as this enzyme destroys protein and inhibits gluten development.
* Actinidain (EC 3.4. 22.14, actinidin, Actinidia anionic protease, proteinase A2 of Actinidia chinensis) is a type of cysteine protease enzyme found in fruits including kiwifruit (genus Actinidia), pineapple, mango, banana and papaya. This enzyme is part of the papain-like peptidase C1 family.

How to make a Sourdough Yeast Water Starter
Ingredients
The amounts don’t matter, the proportions do.
– 1/2 cup of your choice of fruit, cut into eaqually sized pieces
– 1 cup (or 237g) non-chlorinated water
Method
These are great during the summer as Yeast Water Starters prefer warmer temperatures, the ideal range for yeast water fermentation is between 25ºC – 27ºC./77ºF – 80ºF
- Place your fruit and water in a container and cover loosely. Leave somewhere warm.
- As the fruit ferments CO2 gas will build up, so be careful not to cover too tightly.
- Stir or shake your yeast water vigorously at least once a day to prevent mould growth.
- Your water will become less clear and may be a bit cloudly, hopefully you will see small bubbles forming
- Test the pH level, if it registers at 4 or lower, your yeast water is ready to use. If not continue to release gas and shake until it is reaches the optimal pH level.
- If you plan on keeping and maintaining a yeast water, refresh the fruit every few days and check the pH levels before use.
- Use the Yeast Water to create a Starter, with equal parts AP flour or use as the water when creating your autolyse.
Baker’s Tips:
Safety first!
- Ensure your yeast water is safe to consume by testing its pH level. This can be done easily using pH test strips. Your yeast water may appear active, but it may not be acidic enough, therefore unsafe for consumption. Safety is paramount, your yeast water should register at a pH of 4 or lower before you can use it.
