Ajwain is known as ajamo in Gujarat, omam in Tamil, vamu in Telugu and carom seeds in English. Despite the name, the seeds are not seeds at all but the dried fruit of the Trachyspermum ammi plant, a relative of cumin and parsley.

The flavour is unusually strong for something used in such small quantities. A quarter teaspoon flavours an entire batch of dough. This comes from thymol, the same compound found in thyme, which gives ajwain its distinctive sharp, slightly bitter, medicinal edge. Used correctly, it cuts through richness. Used heavily, it overwhelms everything else in the dish.

Whole seeds hold that thymol far better than ground ajwain does. Once crushed, the volatile oils begin escaping within hours, which is why ajwain is almost always sold and stored whole and crushed only at the moment of use.

The technique matters more than the quantity. Rubbing the seeds between your palms for a few seconds before adding them breaks the surface and releases the oils. Adding whole uncrushed seeds to dough gives you texture without much flavour.

How to Identify Good Ajwain

• Small oval seeds with visible ridges, greyish green to light brown
• Sharp thyme-like aroma released when rubbed between the palms
• Dry and free-flowing, not clumped or damp
• Free from stalk fragments, husk and grit
• Uniform seed size with minimal dust at the bottom of the pack

Ajwain in Indian Cooking

Ajwain sits in the same family as cumin and ajmoda, and shows up across regional cuisines in specific, limited roles.

• Rubbed into paratha and puri dough
• Added to besan batter for pakoda and bhajiya
• Tempered in oil for dal and sabzi
• Used in pickle masala alongside methi and rai
• Sprinkled over papad and namkeen
• Part of many Gujarati and Rajasthani snack recipes
• Used in Punjabi cooking with fish and paneer

Ajwain is a culinary spice. It has a long history of household use for digestion, but any questions about medicinal use should go to a qualified doctor.

How to Use Ajwain

In dough:

• Take a quarter to half teaspoon for two cups of atta.
• Rub the seeds between your palms directly over the flour. The aroma should be immediately noticeable.
• Knead as usual. This works for paratha, puri, thepla and masala roti.

In tadka:

• Heat oil or ghee until shimmering.
• Add ajwain along with jeera and hing.
• The seeds should sizzle and darken slightly within five to ten seconds. Remove from heat immediately.
• Ajwain burns faster than jeera and turns harshly bitter when it does, so watch it closely.

In batter:

• Add a quarter teaspoon of crushed ajwain per cup of besan for pakoda and bhajiya.
• It cuts the heaviness of fried food, which is the traditional reason it appears in these recipes.

Start with less than you think you need. Ajwain is one of the few Indian spices where a small excess ruins the dish rather than simply strengthening it.

Dishes That Use Ajwain

• Ajwain paratha and puri
• Methi thepla
• Pakoda and bhajiya batter
• Dal tadka
• Pickle masala
• Papad and khakhra
• Namkeen and mathri
• Amritsari fish batter
• Paneer tikka marinade

How to Store Ajwain

Keep the seeds in an airtight container in a cool, dry place away from sunlight. Ajwain holds its aroma better than most ground spices, but heat and light still drive off the volatile oils that carry the flavour.

Do not store above the stove. The steam and heat from daily cooking are the fastest way to flatten a spice.

Whole ajwain keeps its strength for about a year, and the pack will still be usable after that, just noticeably weaker. The test is simple: rub a few seeds between your palms. If the sharp aroma comes through clearly, the spice is still good. If it smells faint or dusty, it has faded.

Never grind more than you need for immediate use. Ground ajwain loses its punch within days.