Why This Technique?
An 'alter teig' (old dough) is a small prefement made from previously fermented dough that adds flavor, acidity balance and improved oven spring when folded into the final dough.
An aged dough portion contributes matured enzymatic activity and organic acids which deepen flavor and improve dough handling. It acts like a preferment but often contains broken-down gluten and metabolites that encourage stronger fermentation dynamics and richer aroma in the final loaf [1][2].
🛒 Recommended Products
We recommend the following tools for this recipe:
Digital Kitchen Scale
Accurate measurements are essential for building and maintaining an 'alter' dough
Glass Jar for Starter
Good vessel for maintaining a portion of mature dough or starter
Banneton Proofing Basket
Helps shape and stabilize dough that benefits from an older dough portion
Dough Scraper/Bench Knife
Essential for handling sticky, aged dough portions cleanly
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When to Use
✓ Suitable for:
- • When you want deeper flavor without extending bulk fermentation [1]
- • Breads where a tangy, mature profile is desired (country loaves, bâtards)
- • When your starter is active but you want to temper fermentation timing
✗ Not suitable for:
- • Very fast schedules that require no additional acidity → Alter teig adds acidity and can slow downstream yeast activity if overused
- • 100% rye breads → Rye relies on enzymatic activity rather than gluten structure; prefer dedicated rye sourdough methods [2]
Step by Step
Preparation:
Use a [large mixing bowl](https://amzn.to/45rc1Gk) and a [dough scraper](https://amzn.to/3LR1f5E) for incorporation. Have your final dough ingredients measured on a [kitchen scale](https://amzn.to/4pUMVHi).
Reserve or build the alter teig at least the day before baking (see schedule below). It should be cold and tangy when you use it.
Mix final dough flour and water (autolyse) and rest 20–60 minutes depending on hydration.
Add salt, active starter (if using separately) and the measured portion of alter teig to the dough. Use a dough scraper or fold to incorporate without overworking.
Proceed with bulk fermentation, using gentle folds or coil fold as needed to develop gluten [1].
Shape and proof in a banneton proofing basket or lined bowl. Bake in a preheated Dutch oven or cloche for strong initial steam and oven spring.
🎬 Video Tutorial
Practical demonstration of building and using an alter teig to enrich sourdough flavor and structure.
Common Mistakes
❌ Using too large a proportion
Problem: Excessive acidity and enzymatic breakdown can weaken dough and reduce oven spring
Solution: Keep alter teig between 5–20% of final flour weight and test adjustments gradually [1].
❌ Using overfermented, soured sludge
Problem: May produce off-flavors and poor structure
Solution: Discard if extremely watery or putrid; keep alter teig at moderate hydration and refrigerate to control fermentation [2].
❌ Not accounting for temperature
Problem: Activity will change — a cold alter teig will slow fermentation of the final dough
Solution: Adjust young starter amount or bulk time when adding a cold, strong alter teig; monitor dough activity rather than clock time [1].