Injera is a sour fermented pancake-like flatbread with a slightly spongy texture, traditionally made of teff flour. In Ethiopia and Eritrea, injera is a staple. Injera is central to the dining process in Amhara community, like bread or rice elsewhere and is usually stored in the mesob.

Sourdough or sourdough bread is a bread made by the fermentation of dough using wild lactobacillaceae and yeast. Lactic acid from fermentation imparts a sour taste and improves keeping qualities.