Why is yeat used in making bread?

Yeast is a key ingredient in bread making because it's a single-celled fungus that plays a crucial role in the fermentation process. Here's how it works:

1. Yeast consumes sugar: Yeast feeds on sugars found in flour.

2. Yeast produces CO2 and alcohol: As yeast eats the sugar, it releases carbon dioxide (CO2) and alcohol as byproducts.

3. CO2 creates air pockets: The CO2 gas gets trapped within the dough, creating the air pockets that make bread light and fluffy.

4. Alcohol evaporates: Most of the alcohol produced during fermentation evaporates during baking.

So, yeast is essential for bread making because it creates the bubbles and structure that give bread its characteristic texture. Without yeast, bread would be dense and flat.