Scald / Tangzhong

Scalding — known in Japanese baking as tangzhong (from Chinese 湯種, tāng zhǒng, 'hot seed') or in its more thorough form as yudane — is the technique of cooking a small portion of the recipe's flour with water or milk at temperatures between 65 °C and 95 °C (149–203 °F). At around 65 °C the starch granules in flour absorb water and swell irreversibly, rupturing their crystalline structure in a process called gelatinization. The resulting paste or roux carries far more bound water than raw flour can hold — starch can absorb up to five times its weight in water once gelatinized. When this pre-gelatinized mass is folded into the final dough, the extra moisture is locked inside the starch network and is not driven off during baking, producing a crumb that is exceptionally tender, moist, and feather-light. The loaf also stales more slowly because the gelatinized starch retrogrades at a slower rate than raw starch. Two methods are in common use. The tangzhong method, popularized by Taiwanese cookbook author Yvonne Chen, cooks 5–10 % of the total flour with five parts water to one part flour, stirring over medium heat until the mixture thickens to about 65 °C and leaves lines in the paste. The resulting slurry is cooled before incorporation. The yudane method, favored in Japan, combines a 1:1 ratio of flour and boiling water (100 °C), stirs vigorously, then wraps and refrigerates the paste overnight, allowing the flour to hydrate fully and the starch to gelatinize more completely. Yudane typically yields a slightly chewier, more structured crumb than the softer tangzhong result. Both methods are applied to enriched doughs — most classically Hokkaido milk bread (shokupan), brioche-adjacent rolls, and Taiwanese pineapple cake dough — but the technique transfers to any bread where extreme softness is the goal.

“She whisked the tangzhong over medium heat until it hit 65 °C and left ripple-trails in the pan, then let it cool completely before working it into the shokupan dough — the result was a loaf so pillowy it sprang back when pressed.”

• techniquesGelatinization
• techniquesEnriched Dough
• ConceptStarch Retrogradation

1. 1.The Bread Baker's Apprentice — Peter Reinhart (Ten Speed Press, 2001)
2. 2.Japanese Farm Food — Nancy Singleton Hachisu (Andrews McMeel, 2012)
3. 3.Modernist Bread — Myhrvold & Migoya (The Cooking Lab, 2017)
4. 4.65°C Bread Doctor (湯種麵包) — Yvonne Chen (2003)

Confidence: high