FERMENTED
the slow WAY

Rice and lentils, stone ground and left to wake up overnight. Then pressed onto a hot griddle for benne dosa, thatte idli and appam — South Indian cooking with time as the main ingredient.

12h
Batter rest
100%
Veg kitchen
8am
Kaapi from
Golden dosa with sambhar and coconut chutney on a dark plate
Benne Dosa ·Thatte Idli ·Filter Kaapi ·Kanji ·Podi Butter ·Paniyaram ·Medhu Vada ·
Benne Dosa ·Thatte Idli ·Filter Kaapi ·Kanji ·Podi Butter ·Paniyaram ·Medhu Vada ·
Clay pots of rice and lentil batter fermenting in a warm kitchen

Time does most
of the cooking.

We soak, grind and rest every batter in-house — no shortcuts, no premixes. Fermentation builds the sour edge, the lace on an appam and the airy crumb of a thatte idli. Everything else is butter, ghee, podi and a very hot tawa.

  • Rested 12h

    Overnight ferment

  • Stone ground

    Rice & urad dal

  • Griddled to order

    Never held

What people come back for

Full menu

Classic Benne

£6.45

Fermented rice and lentil crepe enriched with butter, cooked to a soft centre with light crisp edges.

Podi Benne

£6.95

Benne finished with roasted lentil spice powder, adding nutty depth and a dry, savoury heat.

Thatte Idli

£5.75

Wide steamed rice-lentil cake made from fermented batter. Soft, airy and mildly tangy.

Paper Roast

£5.95

Thin fermented rice crepe spread and cooked to a crisp, delicate texture.

Podi Butter Uttapam

£5.95

Fermented rice and lentil base finished with roasted podi and butter, nutty and earthy.

Kaapi Affogato

£4.95

Vanilla ice cream topped with hot South Indian filter coffee.

Rated 4.9 by our neighbours

412 reviews
“The benne dosa is the closest thing to Bengaluru I have found in London. Crisp edges, proper ghee, and the chutney is not sweetened.”

Priya N.

Google · Harrow

“Came for coffee, stayed for a full breakfast set. Thatte idli was pillowy and the filter kaapi genuinely strong. Staff explained the ferment to us.”

Tom Whitaker

TripAdvisor · Visited twice

“Ordered for four and everything arrived hot and boxed properly. The podi butter dosa survived the drive home, which says a lot.”

Aisha R.

Deliveroo · Takeaway

Inside the house

Batter, tawa, table. A few frames from an ordinary morning in Harrow.

Thatte idli with coconut chutney on a dark plate
Batter being poured onto a hot griddle
Warm dining room with terracotta walls and pendant lights
Medhu vada with sambhar in steel bowls
Head chef standing beside the tawa in the Ferment House kitchen

“My grandmother never
measured anything.”

She read the batter with her hand — how it fell off the ladle, how it smelled on the third day. I brought that habit from Bengaluru to Harrow and kept it, even when it made mornings longer.

So we grind our own rice and dal, rest it overnight and cook to order. Some days the ferment runs fast, some days slow. We adjust. That is the whole recipe.

Ravi Subramanian

Head Chef & Co-founder

Hot off the tawa, boxed for the walk home.

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