Mastering Sourdough Levain
Relying on your jar of starter directly often leads to unpredictable loaves because the strength of the culture fluctuates. Building a levain gives you a consistent, refreshed starting point for every bake.
Consistency is the only goal
Your levain should double or triple in volume and pass the float test before you mix it into your flour. If it remains flat or sluggish, your ambient temperature is likely too low.
- small glass jar
- digital scale
- silicone spatula
What goes in.
- 25gmature sourdough starter (from the fridge)
- 50gbread flour
- 50gwhole wheat flour
- 100gfiltered water (80°F)
Timing the rise
When the surface of the levain starts to dome slightly rather than remaining flat or caving in, the yeast is at maximum colony density. Use it immediately at this moment.
The method.
Refresh the culture
Add the 25g of starter to your jar and pour in the water. Use the spatula to break up the starter until the water turns milky.
Incorporate flours
Add the bread flour and whole wheat flour. Mix vigorously until no dry pockets remain. The texture should resemble a thick, sticky paste.
Mark the level
Place a rubber band around the jar at the level of the mixture so you can track the growth visually.
Ferment
Cover loosely and keep in a spot between 72°F and 78°F. Wait until the mixture has tripled in volume and shows plenty of bubbles on the sides and top.
Other turns to take.
Rye-Heavy Levain
Replace the whole wheat flour with dark rye for a faster fermentation and a sharper, more acidic flavor profile.
Cold-Water Levain
Use 60°F water to slow down the levain's activity if you need to delay your mixing schedule by a few hours.
When it doesn't go to plan.
Always use filtered or non-chlorinated water; chlorine can inhibit the wild yeast over time.
If your kitchen is cold, place the jar inside an oven that is turned off but contains a bowl of hot water.
A levain that smells like overripe fruit or nail polish remover is past its peak; discard and start a fresh, smaller build.
The ones that keep coming up.
Can I use all of my starter to make the levain?
Never use your entire supply. Keep a small portion back in your main jar to feed and store, so you always have a mother culture to build from.
What if my levain doesn't rise?
Check your water temperature and the age of your flour. If the starter was sluggish in the fridge, it may need two back-to-back feedings at room temperature before it regains enough vigor to build a levain.