Overview
Halving a sourdough recipe is common when you want fewer loaves or want to practice. The core is consistent percentage-based scaling: convert the original recipe to bakers' percentages, divide every ingredient by two, and re-calculate weights precisely. Use a digital kitchen scale for all measurements to maintain dough consistency. Guidelines and examples below follow established sourdough practice and reasoning from sourdough authorities [1][2].
🛒 Recommended Products
We recommend the following tools for this recipe:
Digital Kitchen Scale
Essential for accurate measurements when halving recipes
Glass Jar for Starter
Keeps starter visible and easy to feed at smaller volumes
Dough Scraper/Bench Knife
Helps handle smaller dough mass cleanly during folds and shaping
Banneton Proofing Basket
Maintains shape when proofing smaller loaves
Dutch Oven or Cast Iron Pot
Retains steam and heat for good oven spring on reduced loaves
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Basic Principles And Math
Work in baker's percentages: flour = 100%; hydration = (water ÷ total flour) × 100; starter expressed as % of flour. Converting a recipe to baker's percentages reveals the relationships that should remain unchanged when halving. Example: original formula 1000 g total flour, 750 g water (75% hydration). Halved flour = 500 g, water = 375 g to keep 75% hydration. Always round to the nearest gram on a digital kitchen scale for reproducible results [1].
Step By Step Halving Method
- Convert the recipe to weights and confirm total flour.
- Divide every weight by two.
- Check hydration and adjust if necessary for small rounding differences.
- If the recipe uses a levain percentage, scale the levain ingredients proportionally rather than substituting a fixed starter weight.
- Mix, bulk ferment, shape, and bake using the same timings as the original but watch dough behavior because smaller dough masses ferment faster [1][2]. When handling the dough use a dough scraper to fold and a large mixing bowl for bulk ferment.
Starter Adjustments
Two common approaches to halving levains: A) Halve the total levain weight exactly, preparing a smaller levain with the same flour:water:starter ratio; B) Use a portion of your mature starter directly, adjusting the active starter percentage relative to the dough flour. If the original calls for 200 g levain (1:1 flour:water) and you halve to 100 g, prepare a 100 g levain with the same refresh ratio. Maintain the same inoculation percentage (starter as % of dough flour) to preserve fermentation timing. For managing starter storage and feeding when working smaller, use a glass jar for starter and a jar spatula for clean mixing [1][2].
Timing And Fermentation
Smaller doughs often warm and ferment faster because of higher surface area-to-volume ratio. Expect shorter bulk fermentation and proof times—monitor dough by volume and feel rather than strictly following clock time. Use an instant-read thermometer to measure dough temperature target (usually 24–27°C depending on recipe) and adjust ambient temperature with a proofing box if needed. When in doubt, rely on established visual cues: dough should increase ~30–60% during bulk depending on the formula and exhibit increased extensibility [1][2].
Common Problems And Fixes
Problem: Overproofing the halved dough because times weren't adjusted. Fix: shorten bulk/proof and use cold retardation in the fridge to regain control. Problem: Starter amount seems too small and dough is sluggish. Fix: increase levain inoculation slightly (by 5–10% of dough flour) or use a warmer proof to speed activity. Problem: Texture differs slightly due to rounding errors. Fix: adjust hydration by ±5–10 g water in subsequent bakes and log changes. These troubleshooting steps reflect practical experience and guidance from established sourdough resources [1][2].
Tools And Practical Tips
Tools: weigh everything on a digital kitchen scale; keep starter in a glass jar for starter; mix with a dough whisk or in a large mixing bowl; shape on a lightly floured surface and rest in a banneton proofing basket or lined bowl; score with a bread lame/scoring tool; bake in a Dutch oven or cast iron pot or cloche for best oven spring; use parchment paper for easy transfer. Label and log changes when halving so you can refine hydration, levain percentage, and timings on future bakes [1][2].
Example Quick Reference
Original: 1000 g flour, 750 g water, 200 g levain (1:1), 20 g salt. Halved: 500 g flour, 375 g water, 100 g levain, 10 g salt. Mix method and fermentation cues remain the same, but expect shorter times and adjust as described above. This direct proportional scaling is the simplest and most reliable method recommended in sourdough literature [1][2].