Eli5 – Why can’t you just mix a bunch of flour and water into sour dough starter to expand it?

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My boyfriend and I were talking about sour dough starters and I was explaining the delicate balance of feeding it with ratios of flour and water. His question is why I couldn’t just mix a large quantity of water and flour and let the yeast just eat as it wants and then you would have a large amount of starter. And I just don’t know why. Thanks!

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Anonymous 0 Comments

You actually could, as long as you had the right proportions it might work. But as the other poster explained you run the risk of inoculating the dough with an unwanted culture. This is mitigated by only adding a certain amount at a time you expect to be fully colonized by your culture.

But if you think about it that’s similar to what you do when making beer or wine, you’re adding only an Oz of yeast to 5 or 6 gallons of water, food, and nutrients for your yeast culture.

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