How to Build 90g of 1:2:1 Stiff (50%) Sourdough Starter (23g Seed, 45g Flour, 22g Water)
Low-hydration stiff levain math (50% Stiff Lievito Madre) to build 90g of sweet, low-acidity starter for artisan bread or enriched dough.
There are exactly 4 parts in a 1:2:1 Stiff (50%) feed. At 90 grams that is 22.5g per part — 23g of it is the seed culture you already own, 45g is new flour and 22g is water. Expect a 6 - 8 hrs window to full dome at 75°F. The zero-discard version builds 110g (28g / 55g / 27g) so 20g always survives in the jar. Suits Italian Lievito Madre / Panettone low-acid stiff build.
- Exact 90g Build
- 23g : 45g : 22gStarter : Flour : Water (1:2:1 Stiff (50%))
- 90g + 20g Jar Reserve
- 28g : 55g : 27gBuilds 110g total (0g discard waste)
- Estimated Peak Window
- 6 - 8 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 50%Italian Lievito Madre / Panettone low-acid stiff build
Scaling 1:2:1 Stiff (50%) Feeds Across 70g to 110g
Neighbourhood of 1:2:1 Stiff (50%) builds used to sanity-check a scaled recipe before committing flour to the mixer.
| Levain Yield | Culture (1) | Feed Flour (2) | Feed Water (1) | Estimated Peak Window |
|---|---|---|---|---|
| 90g 1:2:1 Stiff (50%) ([Your Target]) | seed 23g | fresh flour 45g | room-temp water 22g | peak 6 - 8 hrs at 75°F |
| 100g 1:2:1 Stiff (50%) (Leaner Read) | seed 25g | fresh flour 50g | room-temp water 25g | peak 6 - 8 hrs at 75°F |
| 80g 1:2:1 Stiff (50%) (Fuller Read) | seed 20g | fresh flour 40g | room-temp water 20g | peak 6 - 8 hrs at 75°F |
| 110g 1:2:1 Stiff (50%) (Micro Scale) | seed 28g | fresh flour 55g | room-temp water 27g | peak 6 - 8 hrs at 75°F |
| 70g 1:2:1 Stiff (50%) (Large Scale) | seed 18g | fresh flour 35g | room-temp water 17g | peak 6 - 8 hrs at 75°F |
Real-Time Dough & Starter Scaling Sandbox
Scale this 1:2:1 Stiff (50%) (1 2 1 stiff) Sour specification up or down on your digital scale with zero hydration drift.
How 1:2:1 Stiff (50%) Hydration Shifts Lactic-to-Acetic Fermentation in a 90g Build
Each gram of the 45g flour portion in a 1:2:1 Stiff (50%) feed absorbs roughly half its weight in water once fully hydrated, so the 22g water portion at 50% Stiff Lievito Madre sits exactly where the flour becomes a pourable paste rather than a shaggy mass — the consistency you want in a 90g sourdough culture.
Timing your bake around the feed is what makes a 1:2:1 Stiff (50%) build useful: count backwards from your target oven time by 6 - 8 hrs plus your bulk duration, and you arrive at the moment you should stir 45g of flour into 22g of water for italian lievito madre / panettone low-acid stiff build.
Zero-Discard Scraping Method for 90g Levain (1:2:1 Stiff (50%))
- Zero the Scale and Pre-weigh (28g / 55g / 27g): Set out three vessels and weigh each ingredient before you open the starter jar.
- Bloom the Seed (28g): Add the 28g of ripe seed to 27g of water and stir until the mixture becomes a uniform cloudy suspension.
- Add Flour in Two Pours (55g): Incorporate half the flour, wait 20 minutes for hydration, then work in the remainder so no dry pockets survive.
- Ferment to a Dome (6 - 8 hrs): At 75°F the 1:2:1 Stiff (50%) culture should double and dome in 6 - 8 hrs; pull 90g at peak and return 20g to the fridge.
Diagnostic Answers: 1:2:1 Stiff (50%) (1 2 1 stiff) Sourdough Le
What is the real difference between 1:2:1 Stiff (50%) and a 1:1:1 feed?
A 1:1:1 feed keeps one third of the batch as seed and peaks fastest; 1:2:1 Stiff (50%) keeps one 4th, so it ripens more slowly but with far less inherited acidity.
What flour should I use for a 90g 1:2:1 Stiff (50%) sourdough culture?
A 12%+ protein bread flour for the 45g of flour gives a strong sourdough culture; adding whole wheat or rye at 20% of that weight speeds it up and adds pleasant acidity.
Should the water be warm or cold for a 1:2:1 Stiff (50%) feed?
Room temperature, roughly 70°F (21°C). Hotter water risks shocking the culture, while colder water stretches the 6 - 8 hrs peak considerably.