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I am making my first sourdough starter (and bread of course). I started it 2 days ago, and it looked quite good while in the fermentation process. I only made a small quantity with approx. 1/4 cup of all purpose flour (as I didn't have any Rye Flour) and about less of 1/4 cup of water.

I then let it rest for 24 hours in my kitchen cabinet. I don't want to discard any of the starter, so I want to know what is the minimum time-frame I should wait and leave it to ferment until I can use it. The first day the fermentation seemed very good, with that frothy consistency, and with that ugly fermentation smell, I however, didn't test by floating it by the way.

EDIT: seems already dead my starter after the third day, so i gonna try to make a new one again :P, its my first time making this though...

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To make a sourdough starter work you have to create an environment where tasty yeast and bacteria will succeed and harmful or gross microbes will be either crowded out or unable to tolerate the acidity.

This environment is created by continually feeding the starter. That is, adding a consistent ratio of fresh starch to consume.

I read an analogy, perhaps Peter Reinhart's, that feeding a starter is like mowing a lawn. The big weeds won't get the upper hand if the lawn is kept consistently mowed.

Your sourdough recipe will have a ratio of starter to feed for each feeding. If you choose to not discard any starter then Everytime you feed you will have to use more and more flour to maintain the ratio. Depending on the recipe this could double everyday. It's not sustainable.

It sounds like you aren't feeding the sourdough at all. Depending on the temperature it will take only a short time, perhaps a day or two, before nasty microbes get the upper hand and your starter will rot. Believe me, this is an unpleasant experience.

If you are determined to not throw away starter you can collect the discarded portion in the fridge where the fermentation will be slowed. This can be used as filler in other baked goods but will not provide much sourdough flavor or lift until the starter is ready.

At first I hated throwing away starter but I realized I was costing myself a great deal of hassle to save pennies worth of flour.

When feeding a new starter, the amount of time depends on many variables including the feeding ratio and schedule, floor, present microbes, temperature, and desired pungency. Most recipes seem to call for around ten days and that matches my personal experience.

  • well mine its not frothy anymore in the third day...looks like the microbes won this time :_v ,so i cant do anything if this happen? if so i just gonna throw it away and start a new one, its my first time doing this lol... – Michael Ben David Jul 21 at 22:50
  • It's a little difficult to give specific advice not seeing your starter. In general if the starter goes bad it will change color, grow mold, or smell terrible. If any of those are true then throw it out and start over. Otherwise just keep feeding it. – Sobachatina Jul 21 at 23:52
  • ok i am starting a new one with 5 tbsp of all purpouse flour + 5 of water, and i put this in a glass jar. so how should i feed this and how many days are enough to wait till i use it? – Michael Ben David Jul 22 at 0:09
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    Recipes and timing vary and produce starters that vary in pungency and rising power. Kind Arthur floor is a good resource. kingarthurflour.com/recipes/sourdough-starter-recipe – Sobachatina Jul 22 at 0:32
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A stable sourdough will need some time to develop. During the first one or two weeks, fluctuating activity is perfectly normal, in fact, a vigorous initial activity followed by a lull is a frequent pattern. The rule of thumb is that unlike you see mold or other discoloration and the smell is somewhere between floury, yeasty or pleasantly acidic, you are probably on a good track, in the first days, the smell can be even a bit strange. Start over if you see mold, for low activity, check your recipe and environment (e.g. temperature), continue feeding and see if it perks up.

After a week to ten days, you should notice a “behavioral pattern” in your sourdough - raising and deflating in a similar time for a given feeding ratio and ambient temperature - which indicates a certain stability of the culture. That’s your cue and I recommend you wait until that stage before actually baking with it. If you want to use it sooner (e.g. to use up discard), adding bit of yeast to the dough can support a good raise even if the sourdough isn’t fully mature.

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