Yes, tadka oil can be used in marinades to infuse dishes with aromatic spices and enhance flavor. However, consider the existing spice profile of the marinade to avoid overpowering the dish.
Tadka oil, also known as tempering oil, is created by heating oil or ghee and then adding whole spices, herbs, and aromatics like cumin seeds, mustard seeds, garlic, ginger, and chilies. This process infuses the oil with the flavors of these ingredients. Using tadka oil in a marinade introduces these complex flavors directly into the food being marinated. The oil helps to distribute the flavors evenly and penetrate the surface of the food. When using tadka oil in marinades, it's important to consider the other ingredients in the marinade. If the marinade already contains similar spices, using tadka oil with the same spices might lead to an overpowering flavor. In such cases, you can either adjust the spices in the marinade or use a tadka oil with a complementary flavor profile. For example, if your marinade already has a lot of chili powder, you might want to use a tadka oil with milder spices like cumin and coriander. The oil also helps to keep the food moist during cooking.
Allow the tadka oil to cool slightly before adding it to the marinade, especially if the marinade contains delicate ingredients like yogurt or lemon juice, as the heat can curdle or denature them.