Basil seeds, also known as sabja or tukmaria, are small, black, and tear-shaped seeds that come from the sweet basil plant (Ocimum basilicum). These seeds are commonly used in various beverages, desserts, and traditional dishes, particularly in Southeast Asia and the Indian subcontinent.

When soaked in water, basil seeds swell up and form a gelatinous outer layer, which gives them a unique texture. They are often used in drinks like lemon or fruit juices, offering a refreshing crunch. The seeds are known for their health benefits, which include aiding digestion, boosting hydration, and being rich in fiber, antioxidants, and essential fatty acids.