Turmeric in tadka primarily adds a warm, earthy flavor and a vibrant golden color to the dish. It also contributes subtle bitterness and potential health benefits.
Turmeric, a key ingredient in many Indian cuisines, plays a multifaceted role when used in tadka (also known as tempering or seasoning). When added to hot oil or ghee, turmeric's flavor compounds are released, infusing the oil with its characteristic earthy and slightly bitter notes. This flavored oil then coats the other ingredients in the dish, imparting a warm and aromatic base flavor. The heat also helps to bloom the color of the turmeric, creating a beautiful golden hue that enhances the visual appeal of the final dish. Beyond flavor and color, turmeric contains curcumin, a compound known for its anti-inflammatory and antioxidant properties, adding a potential health benefit to the tadka. The amount of turmeric used is crucial; too much can make the dish overly bitter, while too little may not provide the desired flavor and color.
To prevent turmeric from burning and becoming bitter, add it to the hot oil after other spices like mustard seeds and cumin have already tempered. This ensures it cooks gently and releases its flavor without scorching.