The Transformation of Dough: What Happens Inside the Oven?
While the process may seem straightforward—expansion, moisture loss, crust formation, and setting – each stage is governed by fundamental principles of food science and thermodynamics.
Early Stages: Gas Expansion and Oven Spring
- Yeast activity continues as dough temperature rises.
- Gas production slows after 43°C and stops near 55°C.
- Low thermal conductivity keeps the center cooler, allowing continued CO₂ production.
- Gas expansion drives “oven spring,” causing rapid rise.
- Additional expansion comes from:
- Steam pressure
- Thermal expansion of air
- Dough strength is critical; weak dough may collapse
Moisture Loss and Crust Formation
- Surface moisture evaporates progressively.
- Dehydration forms a crisp crust.
- Maillard reaction creates golden color and flavor.
- Starch gelatinization starts at ~60°C as granules absorb water.
- Enzymes convert starch to dextrins and maltose, affecting texture and sweetness.
Foam-to-Sponge Transition and Final Setting
- Dough begins as a foam: gas bubbles separated by gluten films.
- Heat causes water loss and protein denaturation, making films rigid.
- Gas pressures rupture films, forming a sponge-like crumb.
- At 92–96°C, key changes complete:
- Moisture loss
- Starch gelatinization
- Protein denaturation
- Gas exchange
- Continued baking enhances the crust and reduces residual moisture.
Enhance your technical knowledge with our detailed resources on How to Prevent Bagels From Collapsing After Boiling, Sugar, yeast, and laminated pastries: mastering the art of perfect balance., and Factors Affecting Water Absorption in Baking.
