Powdered spices like turmeric and chili powder should be added to hot oil that is around 250°F (121°C) to prevent burning. Blooming them at this temperature releases their flavor without scorching.
Adding powdered spices directly to very hot oil can cause them to burn almost instantly, resulting in a bitter or acrid flavor. The ideal approach is to temper the oil's heat and introduce the spices at a lower temperature, allowing them to 'bloom.' Blooming refers to the process of gently heating spices in oil to release their essential oils and enhance their flavor profile.
Here's a step-by-step guide:
Always have your other ingredients prepped and ready to add immediately after blooming the spices. This prevents the spices from sitting in the hot oil for too long and potentially burning.