How to Build 180g of 1:2:1 Stiff (50%) Sourdough Starter (45g Seed, 90g Flour, 45g Water)
Low-hydration stiff levain math (50% Stiff Lievito Madre) to build 180g of sweet, low-acidity starter for artisan bread or enriched dough.
Two numbers decide your 1:2:1 Stiff (50%) feed: how much you want (180g) and how much the jar will cling to (20g). The first splits into 45g seed, 90g flour and 45g water. The second pushes it to 50g, 100g and 50g. At 75°F the 50% Stiff Lievito Madre culture is ready in 6 - 8 hrs — a clean fit for Italian Lievito Madre / Panettone low-acid stiff build.
- Exact 180g Build
- 45g : 90g : 45gStarter : Flour : Water (1:2:1 Stiff (50%))
- 180g + 20g Jar Reserve
- 50g : 100g : 50gBuilds 200g 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
1:2:1 Stiff (50%) Sourdough Starter Feeding Chart Around a 180g Build
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 |
|---|---|---|---|---|
| 160g 1:2:1 Stiff (50%) ([Anchor]) | seed 40g | fresh flour 80g | room-temp water 40g | peak 6 - 8 hrs at 75°F |
| 180g 1:2:1 Stiff (50%) (Down 10g) | seed 45g | fresh flour 90g | room-temp water 45g | peak 6 - 8 hrs at 75°F |
| 200g 1:2:1 Stiff (50%) (Up 10g) | seed 50g | fresh flour 100g | room-temp water 50g | peak 6 - 8 hrs at 75°F |
| 170g 1:2:1 Stiff (50%) (Down 20g) | seed 43g | fresh flour 85g | room-temp water 42g | peak 6 - 8 hrs at 75°F |
| 190g 1:2:1 Stiff (50%) (Up 20g) | seed 48g | fresh flour 95g | room-temp water 47g | 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 180g Build
The 1:2:1 Stiff (50%) ratio dilutes organic acid carried over from the previous batch by roughly 4:1 at 180g. Because 45g of that inoculum is only 45.0g per part, the residual lactic and acetic acid entering the new batch is proportionally smaller — which is why 50% Stiff Lievito Madre cultures taste cleaner and rise faster.
If your culture is sluggish or smells sharply of vinegar, the ratio is usually not the culprit — the culture is. Two consecutive warm 1:2:1 Stiff (50%) refreshes, each feeding 90g of fresh flour against 45g of tired seed, strip out accumulated acetic acid and restore yeast vigour faster than any other single intervention.
Zero-Discard Scraping Method for 180g Levain (1:2:1 Stiff (50%))
- Reserve the 20g Jar Remainder (50g): Tip your starter jar and scrape every last gram into a clean vessel — roughly 50g — so nothing is discarded.
- Combine the 1:2:1 Stiff (50%) Feed (100g + 50g): Stir 100g of flour into 50g of seed, then add 50g of room-temperature water until no dry flour remains.
- Mark the 200g Target: Level the jar and tape a line at the starting height; the culture should dome well past it within 6 - 8 hrs at 75°F.
- Harvest 180g and Return 20g: Pour 180g of peaked sourdough culture into your dough, then scrape the surviving 20g back into the jar and refrigerate at 38°F.
Diagnostic Answers: 1:2:1 Stiff (50%) (1 2 1 stiff) Sourdough Le
Can I scale this 180g build up to 360g?
Double every number: 90g starter, 180g flour, 90g water. The ratio, and therefore the 6 - 8 hrs peak, is unchanged.
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.
Is a 1:2:1 Stiff (50%) ratio too acidic for a 180 grams levain?
No. At 1:2:1 Stiff (50%) the acid from the previous batch is diluted across 2 parts of flour and 1 parts of water, giving a 50% stiff lievito madre levain that tastes clean and mild.