While olive oil can be used for tempering spices, it's generally not recommended due to its lower smoke point and distinct flavor which can overpower the spices. Ghee or vegetable oil are better choices.
Tempering, also known as 'tadka' or 'chhonk,' is a cooking technique where whole or ground spices are briefly roasted in hot oil or ghee to release their essential oils and enhance their flavor. This infused oil is then added to a dish, often at the end of cooking, to impart a complex and aromatic flavor profile.
Olive oil has a lower smoke point compared to other oils commonly used for tempering, such as ghee, vegetable oil, or canola oil. When heated beyond its smoke point, olive oil can break down and produce acrid flavors and potentially harmful compounds. Furthermore, olive oil possesses a strong, distinctive flavor that can clash with or mask the delicate flavors of the spices being tempered. While a light, mild olive oil *could* be used in a pinch, the results are unlikely to be as desirable as when using a more neutral-tasting, high-smoke-point oil.
For optimal results, choose an oil with a high smoke point and a neutral flavor profile. Ghee is a traditional choice in Indian cuisine, offering a rich, nutty flavor that complements many spice blends. Vegetable oil, canola oil, or sunflower oil are also suitable alternatives.
Always start with a cold pan and add the oil before heating. This allows for more even heating and prevents the spices from burning too quickly. Monitor the spices closely and remove the pan from the heat if they start to darken too rapidly.