Grain & dough ferment

Injera and other fermented flatbreads

Intermediate

Teff batter fermented for days into a sour, spongy flatbread; appam and naan use shorter ferments.

Temperature: 20–28 °C
Time: 1–3 days; Appam: overnight; naan: a few hours.

Timeline

Stage 1: Mixstart · about 30 min
Hands-on
Stage 2: Fermentfrom 30 min · about 48 h
Fermenting / waiting — Room temperature
Stage 3: Cookfrom 2 days · about 2 h
Hands-on

Ingredients

Teff flour (often with some wheat or barley)
Water
Ersho (liquid from a previous batch) or a spoon of sourdough starter

Equipment

Large bowl
Non-stick pan or mitad with lid

Steps

Mix teff with water and ersho into a thin paste; cover.
Leave at room temperature 1–3 days until bubbly and sour; pour off the liquid on top (save some as ersho).
Some cooks cook a portion into a paste (absit) and stir it back in.
Rest 30–60 minutes until bubbly again; cook thin on a hot pan, covered, without flipping.

Is it working?

Bubbly, sour batter
Cooked injera covered in small 'eyes'

Smell & texture: Sour and grainy; spongy, soft bread.

Signs tell you it's fermenting, not that it's safe: never rely on smell or appearance alone.

Safety, mould and discard rules

Mould or yeast?

A yellowish liquid on top is normal (pour off). Fuzz or coloured spots: discard.

Storage

Cooked injera: wrapped, 1–2 days at room temperature or longer in the fridge.

Shelf life: Batter: use within the planned ferment.

The science: what's happening

Teff flour and water are fermented with a starter liquid (ersho) from the last batch. Yeasts and lactic bacteria produce gas and sourness over one to three days.

Organisms

Wild yeasts
Lactic acid bacteria

Troubleshooting

No eyes: Batter too thick or not fermented enough.

A dish (not a ferment) gone wrong? Try Recipe Rescue.

Cook with it

Learn more

Sources

Potential Hazards with Fermented Foods — Association of Food and Drug Officials

Guidance changes: check the source for current wording. Original text; figures quoted from the sources where stated.