A Sourdough Starter 

This is a stiff starter. It is a 1:3 ratio, starter to flour. It has the same feel as a final dough. I find it easy to use and especially easy to keep in the fridge.This is 70% hydration. Also I use half all purpose white flour and half whole wheat bread flour.

1 oz mother starter
3 oz flour (I am using 1/2 whole wheat and 1/2 white bread flour)
2.5 oz water
Makes ~6 oz starter

2 oz starter
6 oz flour
5 oz water
Makes ~12 oz starter

3 oz starter
9 oz flour
7.5 oz water
Makes ~ 18 oz

4 oz starter
12 oz flour
10 oz water
Makes ~ 25 oz

6 oz starter
18 oz flour
15 oz water
Makes ~ 37 oz

16 oz starter
48 oz flour (24 white, 24 WW)
36 oz water
Makes ~ 98 oz

~TO MIX UP A SOFTER STARTER
4 oz starter
4 oz flour
4 oz water
This is 1:1:1

~TO MIX UP A 100% HYDRATION STARTER
-like for my biscuit recipe without extra milk
5 oz starter
5 oz flour
5 oz water AND
30% of the weight of the starter more water. In this case .3 x 5 = 1.5 more oz water.
This makes 16.5 oz which is just right for my biscuit recipe!
Combine:
filtered but warmed (to ~95*) water
flour (I use whole wheat bread flour and white bread flour)
measured starter

Mix:
Stir and fold, rest, fold again with silicone scraper until a strong dough ball forms.

Cover with a plate, or put into a jar so you can measure its rise accurately.

Leave at room temperature 4-8 hours until it doubles. When it was new, and in the winter it took more like 12-14 hours. Once established it takes just 4 hours to rise.

Use this starter immediately or store for later.

Store:
Put it in a jar (If you rose it in a jar, just leave it in the jar) and keep in refrigerator for up to about 2-3 days, in which it is a finished starter ready to be mixed into a final dough. It should still have bubbles and be airy and be a pleasantly strong feeling dough. If not, mix it into a fresh starter.

~If it has sat too long, mix a small amount, then mix again for a freshly mixed active starter for bread.

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