Yes, turmeric can be added directly into pastes, but it's best to bloom it in oil or fat first to enhance its flavor and color.
Turmeric is a versatile spice that can be incorporated into pastes for various culinary applications. Adding it directly is perfectly acceptable, especially if the paste will be cooked. However, turmeric is fat-soluble, meaning its flavor and color compounds (curcuminoids) are more readily released and absorbed when heated in oil or fat. Blooming turmeric involves briefly sautéing it in oil or ghee before adding it to the rest of the ingredients. This process intensifies its earthy flavor and vibrant yellow color, resulting in a more flavorful and visually appealing paste. If you're using turmeric in a raw paste, such as a chutney or a face mask, blooming it beforehand might not be necessary, but it can still improve the overall result. Consider the recipe and desired outcome when deciding whether to bloom the turmeric or add it directly.
When blooming turmeric, be careful not to burn it. Overheating can result in a bitter taste. Sauté it gently over low heat for just a minute or two until fragrant.