Sourdough Starter Ready to use in 3-7 Days


The traditional way to create a starter can take a few weeks to a month to have a usable culture. Some science-minded bakers have figured out a way to accelerate the process to have a viable and very beautiful tasting culture in just 3-7 days. Using heat and hydration it’s possible to speed up the fermentation to get through the “bad bacteria” phase in just 48 hours, leaving you a usable culture on the third day with some luck. I created my starter on a Tuesday and I baked with it on that Friday with great results.

I first came across this method in a post on The Fresh Loaf by the contributor Ars Pistorica, AKA Ian Lowe of Apiece Bakery in Tasmania. I’ve been using this method ever since I first read about it in 2013. He uses whole wheat and/or rye. It’s not the only way to accelerate the first stages of creating a starter, but this is how I’ve adapted this method to various gluten-free grains.

Use whole grain, freshly milled flour if possible. The method can be used for almost any kind of flour, including roots like potato or cassava flour (though I haven't tested this). Teff is the absolute best, but it’s expensive so I usually use sorghum. I tried millet for the first time this time around and it turned out amazing to my surprise.

You need some way to keep the culture at a consistent temperature for 24 hours at a time. I use a seedling heat mat, but a yogurt machine or a large insulated jug or cooler filled with water at the correct temperature also works.


Step 1
In a plastic gallon bag or in a large silicone bag mix:
50g flour
100g spring water

Temp:
40°C/104°f
Lay these directly on the seedling mat or immerse in warm water and keep heated to a constant temperature for 24 hours.



Step 2:
The culture may smell anywhere from mildly funky to really, really bad. This is normal.
Add to the bag and mix in as best you can:
50g flour

Temp:
35°c/95°f
If it’s so thick it’s hard to mix, you can add about 80g spring water. I usually do this for sorghum starters.
Lay the bag on a cooling rack over the seedling mat or immerse in warm water and keep heated at a constant temperature for 24 hours.

Step 3:
Mix the contents of the bag thoroughly before extracting some for your culture. In a clean, sanitized glass jar, mix:
5g culture from step 2
50g flour
40-60g spring water

Temp:
30°c/86°f
Keep at a consistent temperature for 24 hours. Placing the jar on a cooling rack over the seedling mat is usually about right for this step.
My recommendations based on experience is:
40g water for: millet
60g water for: sorghum, teff
50g water for: most other flours or if you don’t know you can start with this and see how it goes. The mixture should have the consistency of a pancake batter.

Do not use the rest of the discard - just dispose of it. You may use the discard from step 4 onward if it smells good.

Step 4 (
and until you retire it):
5g starter from previous day’s mix
50g flour
40-60g spring water
Temp: Room temp or up to 27°c/81°f

Feed the starter by mixing in a new jar every 24 hours. You may now keep the starter at room temp if you like. You may have to adjust feeding amount based on your climate and schedule. This schedule is feeding every 24 hours at 1:10:10, but if you like feeding 1:1:1 every 12 hours you may convert it to that schedule. Don't feed less than 1:1:1 or more than 1:20:20. Starter should not peak until after 12 hours. If it is peaking sooner, reduce the amount of starter you use to inoculate.


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