Adding aromatics to oil before it's fully hot allows their flavors to infuse more deeply into the oil, but it can also lead to burning if the oil gets too hot too quickly. Monitor the temperature carefully.
The timing of when you add aromatics to oil significantly impacts the final flavor of your dish. Adding them to cold or lukewarm oil allows for a slower, more gradual release of their flavors. This is because the lower temperature encourages the aromatics to gently sweat and release their essential oils without immediately scorching. This technique is often used when you want a subtle, infused flavor throughout the entire dish.However, there's a risk involved. If the oil heats up too quickly, the aromatics can burn before they've had a chance to properly infuse. Burnt aromatics will impart a bitter, unpleasant taste to the oil and, consequently, to your entire dish. Therefore, it's crucial to monitor the oil's temperature closely and use a low to medium heat setting. You can also add a small amount of water to the oil initially; the water will evaporate as the oil heats, helping to prevent burning.Conversely, adding aromatics to already hot oil results in a quicker, more intense burst of flavor. This is ideal when you want a pronounced aromatic presence in the dish. However, the window of opportunity is smaller, and you need to be quick to prevent burning.
When infusing oil with aromatics at lower temperatures, use a thermometer to ensure the oil doesn't exceed 250°F (121°C). This prevents burning and allows for optimal flavor extraction.