Raw tamarind is intensely sour and acidic, while cooked tamarind develops a sweeter, more mellow flavor with caramel-like undertones. Cooking reduces the acidity and enhances its natural sugars.
The flavor profile of tamarind changes significantly depending on whether it's used raw or cooked. Raw tamarind pulp is extremely tart and acidic, often described as having a sharp, sour taste. This is due to the high concentration of tartaric acid present in the fruit. When used raw, it provides a strong, tangy element to dishes.
Cooking tamarind, on the other hand, transforms its flavor. The heat helps to break down the complex acids, reducing the intensity of the sourness. Simultaneously, the natural sugars in the tamarind caramelize, resulting in a sweeter, more balanced flavor. Cooked tamarind often has notes of dried fruit and a subtle sweetness that complements its remaining tartness. The cooking process also softens the pulp, making it easier to incorporate into sauces, chutneys, and other preparations. The exact flavor will also depend on the variety of tamarind used, as some are naturally sweeter than others.
When substituting cooked tamarind for raw tamarind in a recipe, start with a smaller amount and taste as you go. You can always add more to achieve the desired level of tartness, but it's harder to correct if you add too much cooked tamarind initially.