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Robust Sourdough Starter

A guide to starting your own sourdough starter using grapes as a way to help get your starter going.

Course Baking
Cuisine American
Keyword sourdough, sourdough starter

Ingredients

  • 2 cups all-purpose flour
  • 2 cups water filtered if possible
  • ½ lb red purple, or black grapes, preferable organic. DO NOT WASH
  • Several layers of cheesecloth
  • Twine
  • ½ cup whole wheat flour

Plus more flour both whole wheat and all-purpose and water for feedings

Instructions

  1. DO not wash the grapes! You want the natural yeast from the outside to start the sourdough starter.
  2. Clean very thoroughly a large nonmetallic bowl or plastic container that can be sealed with a lid or plastic wrap.
  3. Wrap the grapes in well-washed cheesecloth, tying the corners to form a bag with twine.

  4. Lightly crush them with a rolling pin or clean hands (to release some of the sugar in the fruit and to mix with the natural yeast on the skins.)

  5. Immerse them in the flour-water mixture, swirling them through to mix.
  6. Cover tightly with a lid or plastic wrap.
  7. Leave at room temperature for 5 days, stirring once or twice a day.
  8. The bag of grapes will eventually appear inflated, and liquid will begin to separate from the flour mixture. The mixture will smell slightly fruity and maybe a bit sour. The color will be strange; depending on the grapes, it may even be purple! That is as it should be.

  9. By the fifth day, the bag of grapes will have deflated, the color will be yellow, and smell pleasantly sour. The fermentation is complete. The starter is living but weak, and it needs to be fed.

  10. Remove the grapes and squeeze their juices back into the starter through the cheesecloth.
  11. Add the ½ cup whole wheat flour and stir thoroughly.
  12. Let sit for another 24 hours.

  13. Pour off and discard 1 cup of the starter mixture and stir in 1 cup of all-purpose flour and one cup of water. Let the mixture sit for 24 hours more. Have faith, the mixture needs to be fed and start to grow its strength. There should be some bubbling going on, but it will it might not be much at first. Mine showed almost no life, and then all of a sudden, on the 7th day, it began to really bubble up and grow in size.

  14. Repeat this again for several days to really give the starter some strength building. Switching between all-purpose flour and whole wheat every other day. Feeding once a day until your starter starts to really bubble up and grow substantially with life. Then switch to twice a day for a day or two. The starter should really increase in volume; sometimes, it will even triple. This entire process will take almost 2 weeks to really get some strength.

  15. It is time to place your starter in its new home. You will need a jar or plastic container large enough to have the starter grow to more than triple its size. I use a quart size glass jar with a sealable lid.

  16. Pour out and discard all but 1 cup of the stirred down starter. Feed the starter with one cup of flour and one cup of room temperature water. I will vary the flour content between all all-purpose flour ½ whole wheat and ½ all-purpose as a boost. (I find that the whole wheat flour seems to help give it some vigor. But too much whole wheat flour seems to be too much with the bran turning rancid in the whole grains.)

  17. From this time on, you have a living and even breathing starter that needs to be kept fed and watered. It needs to be fed every 6-12 hours when it is not in the fridge. It all depends on how active your starter is how often you need to feed it to keep it alive.

  18. When you are not using your starter keep the starter in the fridge in a sealed container. It can be left safely for as long as 4 months without feeding. If it has been longer than a few weeks, you will probably need to feed your starter several times before the starter becomes back at full strength.

  19. A starter will mature over time and develop its own flavor and sourness. Give the starter some time to develop its character. Depending on where you live, the yeasts from your region will be more or less sour. But the age of your starter will also influence its flavor.

Recipe Notes

Note, after the first week, and it starts to bubble and froth a bit, you can alternately place the starter in the fridge for 12 hours at a time and take it back out when you have time to feed if you need to.

I find that using whole wheat every once in a while gives the starter zsome extra oomph, as whole wheat flour gives this starter recipe some boost. But if I use all whole wheat flour all the time, the bran in the whole wheat will go rancid, so I only feed the whole wheat every once in a while, say once a month or so.

Treat your starter as a pet or even a friend that needs nurturing. I suggest you actually name your starter as a way to have a “relationship” with your child!