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Everything on The Useful Bubble, organised by topic.

Baking Science

• Baking Soda vs Baking Powder: What Changes — Baking soda is sodium bicarbonate and needs acid plus moisture in the recipe to produce carbon dioxide.
• How Leavening Works in Baking — Leavening works when gas bubbles form or enter a dough or batter, expand, and remain trapped until heat sets the surrounding structure.

Fermentation Basics

• Why Does Bread Dough Collapse After Rising? — Bread dough can collapse because it has proofed too far, because its flour cannot support the intended structure, or because the oven was not hot enough.
• Why Bread Dough Rises — Bread dough rises when yeast metabolizes available sugars and produces carbon dioxide and ethanol.