Part 1
What is Chametz?
When it comes to the process of leavening dough using sourdough and yeast, both methods work through a similar principle: fermentation. However, they achieve this fermentation through different mechanisms.
Yeast: Yeast is a single-celled organism, typically Saccharomyces cerevisiae, which consumes sugars present in the dough and produces carbon dioxide (CO2) and alcohol as byproducts. This process is called alcoholic fermentation. The CO2 gas gets trapped in the dough, causing it to rise.
