Ajwain
Also known as: carom seed, bishop's weed
What Ajwain is
A tiny seed with a bite far beyond its size, kneaded into paratha dough and whisked into pakora batter across North India in quantities measured in pinches. Its reputation runs parallel to the kitchen: ajwain steeped in hot water is one of the most widely used Indian home remedies for indigestion and gas, and its presence in fried snack food is pointed — the seed is traditionally believed to help digest exactly the foods it is added to. In Japan it sits in most Indian grocers' seed shelf in small packets, and Tamil kitchens know it as omam, steeped as omam water for the same complaints. 'Bishop's weed' is an old herbal name that survives on English-language labels; carom is the other one.
The small, ridged, grey-brown fruit of Trachyspermum ammi, an annual in the carrot family grown mostly in the dry plains of Rajasthan and Gujarat, with smaller crops across Egypt, Iran and Afghanistan. It looks like a plumper, paler version of celery seed, and the resemblance runs to flavor: both are rich in thymol, the compound that gives thyme its bite, and ajwain is by far the more concentrated source — a pinch of ajwain carries more thymol than any sprig of thyme a cook would use.
Taste profile
Sharp, hot and unmistakably thyme-like, with a medicinal edge that crosses into bitterness when overused — a quarter teaspoon seasons an entire dough, and more is worse, never better. The heat sits at the back of the throat rather than on the lips. Dry-toasting the seed, or giving it a few seconds in hot ghee, tames the sharpness into a rounder, savory version of itself, and many cooks roast it lightly before kneading it into dough precisely for that reason. In samosa pastry it works the same way as in paratha — worked into the dough rather than the filling — and a few seeds in pakora batter season the whole batch. It also seasons mathri and the other savory biscuits made for travel, snacks chosen partly on the same digestif logic.
Forms to buy
- Whole seed — The only form most kitchens need; keeps its bite for a long time whole.
- Roasted and ground — For snack masalas and home remedies; loses strength faster once ground.
Halal note
A plain dried seed with no processing and no halal concern. Blended snack seasonings built around ajwain — biscuit and chaat masalas — are the only place to check a label for other ingredients.