Overnight 1:10:10 Sourdough Starter Feeding Ratio to Build 180g (12 - 16 hrs Peak Window)
High-dilution overnight levain math to build 180g of sweet, de-acidified starter (100% Liquid) with zero morning collapse.
A 180 g 1:10:10 levain is 9g ripe starter plus 86g flour plus 85g water. Because a 1:10:10 ratio dilutes the previous batch's organic acid hard, this 100% Liquid culture peaks bright and clean in 12 - 16 hrs rather than tasting of vinegar. For a zero-waste routine, build 200g (10g / 95g / 95g) and return 20g to the fridge. Use it for 16-hour hot-climate / low-acidity artisan levain.
- Exact 180g Build
- 9g : 86g : 85gStarter : Flour : Water (1:10:10)
- 180g + 20g Jar Reserve
- 10g : 95g : 95gBuilds 200g total (0g discard waste)
- Estimated Peak Window
- 12 - 16 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 100%16-hour hot-climate / low-acidity artisan levain
Scaling 1:10:10 Feeds Across 160g to 200g
Peak ripening estimates assume a 75°F kitchen and 23°C room; colder kitchens need roughly 3.8% more time per degree.
| Build This Much | Seed (1 Part) | Flour (10 Parts) | Water (10 Parts) | Ripening Time |
|---|---|---|---|---|
| Levain build 160g ([Your Target]) | 8g cultured seed | 76g sifted flour + 76g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 180g (Leaner Read) | 9g cultured seed | 86g sifted flour + 85g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 200g (Fuller Read) | 10g cultured seed | 95g sifted flour + 95g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 170g (Micro Scale) | 8g cultured seed | 81g sifted flour + 81g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 190g (Large Scale) | 9g cultured seed | 90g sifted flour + 91g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
Live Parameter Solver for Overnight 1:10:10 Sourdough Starter Feedin
Dial in custom baker's percentages and export your adjusted 9g : 86g : 85g formula for bake day.
De-Acidifying Your Culture: Why High-Ratio 1:10:10 Feeds Maximize Oven Spring (180g Build)
Temperature and ratio interact. The 1:10:10 figure of 1:10:10 does not mean the same thing in a 68°F kitchen as in an 82°F one: with the 12 - 16 hrs window quoted at 75°F, a cooler room stretches it by roughly 3.8% per degree, so 86g of flour in a 100% Liquid feed may need longer than the label implies.
Flour choice shifts the timeline more than most bakers expect. At 1:10:10 with 86g of flour, a malted bread flour peaks faster and sweeter than an unmalted one, because the added amylase liberates more maltose per minute and the culture simply runs out of substrate sooner.
Zero-Discard Scraping Method for 180g Levain (1:10:10)
- Never Scrap the Jar Clean: Leave a deliberate 10g remnant of starter in the vessel — this is the seed for the next 1:10:10 feed, not waste.
- Top Up with 95g Flour and 95g Water: These two additions convert your remnant into exactly 200g of 100% Liquid levain.
- Wait for the 12 - 16 hrs Peak: Confirm the dome and the escaping gas streaks before you need the levain.
- Return the Surviving 20g: Whatever levain is left after your bake goes straight back into the jar and the refrigerator, and the cycle repeats without a single discarded gram.
Cereal Chemistry & Bench Execution FAQs
How long does a 1:10:10 feeding take to peak?
At 75°F (24°C) the culture domes in 12 - 16 hrs; a cooler room adds roughly 3.8% for every degree below that.
Should the water be warm or cold for a 1:10:10 feed?
Room temperature, roughly 70°F (21°C). Hotter water risks shocking the culture, while colder water stretches the 12 - 16 hrs peak considerably.
How long can I keep the leftover starter in the fridge?
At 38°F (3°C) the 20g reserve rests indefinitely. Cold slows the culture without stopping it, and the 12 - 16 hrs peak simply arrives sooner once you feed it.