Ceylon Cumin Seeds — Whole Cumin (Suduru)

The earthy one in the curry powder. Cumin — suduru in Sinhala, jeera across South Asia — is the warm, smoky backbone of Sri Lankan roasted curry powder, holding the middle ground between coriander's citrus and fennel's sweetness. These are whole seeds for toasting, tempering and grinding fresh — the difference between curry powder that smells like a spice shop and the flat dust in supermarket jars.

How to use cumin seeds

• Curry powders: the essential earthy note — dry-roast with coriander and fennel, then grind. The classic Sri Lankan trio.
• Tempering / tadka: bloom ½ tsp in hot oil with mustard seeds and curry leaves before dhal, vegetables or rice.
• Rice dishes: a teaspoon toasted into the pot lifts plain rice, pilau and biryani.
• Rubs & marinades: toasted, coarsely ground cumin is the base of taco seasoning, shawarma rubs and grilled-meat marinades worldwide.
• Yoghurt & raita: a pinch of toasted ground cumin over yoghurt, raita or hummus is the finishing move.

Toast first — thirty seconds changes everything

Raw cumin is dusty and shy; toasted cumin is warm, nutty and aromatic. Heat a dry pan, add the seeds, and shake for 30–45 seconds until they darken a shade and smell rich. Toast whole, cool, then grind or use as-is. Once ground, cumin fades within weeks — whole seeds keep their character for a year or more, which is why serious kitchens buy whole.

Cumin vs black cumin — not the same spice

Worth knowing before you buy: this is true cumin (Cuminum cyminum) — the familiar earthy, smoky seed of curry powders and taco seasoning. Black cumin seeds are a different plant with a different flavor, used differently. In Sri Lankan cooking, white cumin is suduru and black cumin is kaluduru — recipes name them separately, and they're not interchangeable.

The details

FAQ

Whole cumin seeds or ground cumin — which should I buy?

Whole, almost always. Cumin's aromatic oils fade fast after grinding — whole seeds stay potent for a year and grind in seconds after toasting. Buy ground only if you'll finish it within a few weeks.

How much cumin replaces a teaspoon of ground?

Use a level teaspoon of whole seeds per teaspoon of ground — toasted and freshly ground, it'll actually taste stronger than stale pre-ground, so adjust down slightly if a recipe was written for old powder.

Are cumin and black cumin the same?

No — different plants, different flavors. This is true cumin (Cuminum cyminum, suduru), the curry-powder staple. Black cumin (kaluduru) is a separate spice we sell here. Recipes that name one shouldn't be made with the other.

What's a good cumin substitute?

Nothing matches it exactly. Ground coriander plus a pinch of chili gets partway there; caraway is the closest botanical cousin but noticeably sharper. For curry blends, it's worth just having cumin.

Why did my cumin taste bitter?

Almost always over-toasting — past the fragrant stage, cumin's oils scorch and turn acrid. Thirty to forty-five seconds in a hot dry pan, moving constantly, then straight out of the pan to cool.

Complete the trio: coriander seeds · fennel seeds · then follow our Sri Lankan spice blend recipes to roast your own curry powder.