Cumin seeds should be cooked in hot oil for approximately 10-30 seconds during tadka, or until they start to sizzle and release their aroma. Be careful not to burn them.
Tadka, also known as tempering, is a cooking technique used in Indian cuisine where spices are briefly fried in oil or ghee to release their flavors. The process for cumin seeds is as follows:
Heat oil or ghee in a pan over medium heat. The amount of oil depends on the recipe, but usually, a tablespoon or two is sufficient.
Add the cumin seeds to the hot oil. Ensure the oil is hot enough; you should see a slight shimmer.
Cook the cumin seeds for 10-30 seconds. You'll notice them start to sizzle and pop. This is when they release their aromatic oils.
Watch carefully to prevent burning. Burnt cumin seeds will impart a bitter taste to your dish.
Once the cumin seeds are fragrant and have slightly darkened, proceed with adding other spices or ingredients as per your recipe.
To test if the oil is hot enough, add one or two cumin seeds to the oil. If they sizzle immediately, the oil is ready. If not, wait a few more seconds before adding the rest.