Black Sesame Seeds vs Nigella Seeds (Kalonji): What's the Difference?

Last Updated: March 2026

Two tiny black seeds. Near-identical appearance. Completely different plants, flavours, and culinary traditions. Black sesame seeds and nigella seeds - also known as kalonji, black cumin, or black onion seeds - are among the most commonly confused ingredients in wholefood cooking. If you've ever grabbed the wrong one mid-recipe, you're far from alone.

This guide breaks down exactly what each seed is, how to tell them apart, their nutritional benefits, and how to use them in your kitchen.

What Are Black Sesame Seeds?

Black sesame seeds (Sesamum indicum) are the unhulled, unroasted variant of the sesame plant - one of the oldest cultivated oilseeds in human history. Their deep black colour comes from natural anthocyanin pigments in the seed coat, the same antioxidant pigments found in blueberries and purple cabbage.

In flavour, they are rich, nutty, and slightly sweet - more intense than white sesame seeds, with a depth that deepens further when toasted. Nutritionally, they're exceptional. Our SO Organic Black Sesame Seeds are naturally gluten free, around 20% protein, and exceptionally high in calcium, zinc, phosphorus, potassium, magnesium, iron, and vitamins A, B, and E. A single tablespoon provides around 88mg of calcium - making them one of the most calcium-dense plant foods available and a genuinely valuable addition to plant-based diets.

Black sesame seeds have been used across East and South Asia for thousands of years - known as kuro goma in Japan, hei zhi ma in China, and heukimja in Korea.

What Are Nigella Seeds (Kalonji)?

Nigella seeds (Nigella sativa) - also called kalonji, black cumin, black caraway, black onion seeds, or "the seed of blessing" - are a completely different plant, botanically unrelated to sesame. They belong to the buttercup family and have been used medicinally and culinarily for over 3,000 years. They were even found in Tutankhamun's tomb.

The flavour is nothing like sesame. Nigella seeds are pungent, earthy, and aromatic - with distinct notes of black pepper, oregano, and onion that develop beautifully when the seeds are warmed. They are savoury and complex, with a slightly bitter edge that cuts through rich dishes.

Note on naming: nigella seeds are commonly sold as "black onion seeds" or "black cumin" in many Australian grocers and spice shops. Despite these names, they are not related to onions or cumin. The only reliable identifiers are the Latin name (Nigella sativa) or the name kalonji.

Our SO Organic Nigella Seeds are certified organic by ACO and sourced from India, where kalonji is a kitchen and wellness staple with deep cultural roots.

How to Tell Black Sesame Seeds and Nigella Seeds Apart

Visually they are nearly identical, but look closely:

• Black sesame seeds are smooth, oval, and slightly glossy with a uniform rounded shape
• Nigella seeds are matte, smaller, and have a subtly angular, almost triangular cross-section

The smell test is more reliable. Crush a few seeds between your fingers - black sesame smells nutty and sweet, while nigella has an immediately pungent, onion-like aroma. You'll know within seconds.

Nutritional Comparison: Black Sesame Seeds vs Nigella Seeds

Both seeds are nutrient-dense but serve different nutritional purposes. Black sesame is one of the richest plant sources of calcium - ideal for bone health support in dairy-free diets. Nigella contains thymoquinone, a phytochemical studied for its antioxidant and anti-inflammatory properties, which is unique to this seed and absent in sesame.

How to Use Black Sesame Seeds in Cooking

Lightly toast black sesame seeds in a dry pan for one to two minutes before using - this releases their natural oils and significantly deepens their nutty flavour.

Try them:

• Scattered over smoothie bowls, congee, or rice dishes for texture and a nutritional boost
• Blended into a black sesame latte - a currently trending drink made by blending toasted black sesame seeds with warm oat or almond milk and a touch of honey
• Stirred through hummus or tahini for a darker, richer version
• Sprinkled over stir-fries, roasted vegetables, or noodle bowls as a finishing touch
• Ground into a paste for Asian-inspired desserts such as mochi or black sesame ice cream
• Added to bread doughs, muffin batters, or sprinkled over flatbreads before baking

How to Use Nigella Seeds (Kalonji) in Cooking

Nigella seeds work best in savoury cooking where their pungency is an asset. Gentle heat mellows their raw bitterness and develops their aromatic complexity.

Try them:

• Scattered over homemade naan, Turkish pide, or sourdough before baking
• Added to curries, lentil dals, or chickpea dishes early in cooking to bloom their flavour in oil or ghee
• Mixed into a za'atar-style spice blend with thyme, sumac, and sesame
• Sprinkled over roasted cauliflower, pumpkin, or carrots with olive oil
• Stirred through pickled vegetables - they're traditional in Indian achar and Middle Eastern pickles
• Used in savoury cheese breads or pastries for a complex, gourmet flavour

Do not use nigella seeds in sweet recipes. Their pungent, bitter notes are incompatible with sugar.

Can You Substitute Nigella Seeds for Black Sesame Seeds?

No — and this is important. Despite looking almost identical, their flavours are fundamentally incompatible. Nigella seeds in a dessert recipe will produce an unpleasant bitter, onion-like result. Black sesame in a flatbread or curry won't deliver the aromatic punch that kalonji is there to provide.

If you need a visual substitute only — for garnishing where flavour is less critical — black sesame can sometimes stand in for nigella. But for authentic recipes, use the seed the recipe calls for.

How to Store Both Seeds

Both seeds contain natural oils that turn rancid without proper storage. Keep them in an airtight container away from heat, light, and moisture. Black sesame seeds benefit from refrigeration, particularly in warmer months. Nigella seeds are sensitive to light - store in an opaque container. Properly stored, both will keep for six months to a year.

Frequently Asked Questions

Are nigella seeds the same as black sesame seeds? No. Despite their similar appearance, nigella seeds (Nigella sativa) and black sesame seeds (Sesamum indicum) are botanically unrelated plants from different plant families, with completely different flavour profiles and culinary uses.

What are nigella seeds called in Australia? Nigella seeds are sold under several names in Australia including kalonji, black cumin, black caraway, and black onion seeds. The most reliable identifier is the Latin name Nigella sativa on the label.

What are the health benefits of black sesame seeds? Black sesame seeds are exceptionally high in calcium, zinc, magnesium, iron, and plant protein. They are one of the richest plant-based sources of calcium available, making them valuable for bone health and plant-based diets.

What are the health benefits of nigella seeds (kalonji)? Nigella seeds contain thymoquinone, a phytochemical studied for antioxidant and anti-inflammatory properties. They have been used in traditional Ayurvedic and Middle Eastern medicine for over 3,000 years.

Can I use black sesame seeds instead of nigella seeds in naan? Visually yes, but the flavour will be very different. Nigella seeds provide the characteristic pungent, earthy flavour in naan — black sesame will produce a milder, nuttier result. For authentic naan flavour, use nigella seeds.

Where can I buy black sesame seeds and nigella seeds in Australia? Both are available at Santos Organics as SO Organic Black Sesame Seeds and SO Organic Nigella Seeds, certified organic and available online and in our Byron Bay, Mullumbimby, and Banksia stores.

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Both SO Organic Black Sesame Seeds and SO Organic Nigella Seeds are certified organic and available in 1kg. Every purchase supports our community, our local farmers, and the Northern Rivers region.