Building a Sourdough Starter from Scratch
Creating a sourdough starter requires only flour, water, and patience. You are cultivating wild yeast present in your flour and the environment by providing a consistent food source and temperature over the course of seven to ten days. Once it reliably doubles in size within four to six hours of feeding, it is ready to leaven bread.
Consistency is your greatest tool.
Use filtered water to avoid chlorine, which can inhibit wild yeast growth. A glass jar allows you to monitor the fermentation bubbles through the sides.
- glass quart-sized jar
- kitchen scale
- wooden spoon or silicone spatula
What goes in.
- 50gwhole wheat or rye flour
- 50groom temperature filtered water
Regulating the Culture
You must remove half the starter before each feeding. This keeps the volume manageable and ensures the fresh flour you add is quickly consumed by the yeast colony.
The method.
Day 1: Initial mix
Combine 50g flour and 50g water in your jar. Stir until no dry flour remains. Cover loosely with a lid or cloth and leave in a warm spot.
Day 2: First check
You might see one or two tiny bubbles. Discard half of the mixture, add another 50g flour and 50g water. Stir well.
Days 3-6: Establishing rhythm
Follow the same discard and feed schedule every 24 hours. You are looking for a shift from a flour-and-water smell to something sharper, like overripe fruit or yogurt.
Day 7+: Testing maturity
Once the starter shows a frothy, web-like structure throughout and doubles in size within 6 hours of feeding, it is ready for your first loaf.
Other turns to take.
Rye Start
Rye flour ferments faster than wheat. Use it for the first three days to kickstart the activity if your kitchen is cool.
When it doesn't go to plan.
Mark the jar with a rubber band at the level of the starter immediately after feeding to track how much it rises.
If a dark liquid forms on top, the starter is hungry. Pour it off and feed immediately.
Keep your starter at 70-75°F for the most predictable results.
The ones that keep coming up.
Does it need to be kept in the fridge?
Only once it is established and you aren't baking daily. For the first two weeks, keep it on the counter to build strength.
Can I use bleached flour?
Avoid it. The processing of bleached flour often removes the natural yeasts you are trying to capture.
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