leavened vs unleavened

• unleavened bread has no raising agents and consists of flour and water. other ingredients can be added such as fats, herbs, spices to improve the flavour. examples incude tortilla, roti and matzo
• leavened bread is made of flour, water, salt and yeast. it has a honeycomb structure that is often referred to as solid foam. this honeycomb structure is due to the formation of carbon dioxide gas due to the yeast fermentation