Unleavened bread

Unleavened bread is any of a wide variety of breads which are prepared without using rising agents such as yeast. Unleavened breads are generally flat breads; however, not all flat breads are unleavened. Unleavened breads, such as the tortilla and roti, are staple foods in Central America and South Asia, respectively. Unleavened sacramental bread plays a major part in Christian liturgy and Eucharistic theology.