Amchoor

Amchoor or aamchur or amchur, also referred to as mango powder, is a fruity spice powder made from dried unripe green mangoes and is used as a citrusy seasoning. It is mostly produced in India, and is used to flavour foods and add the nutritional benefits of mangoes when the fresh fruit is out of season. To make amchoor, early-season mangoes are harvested while still green and unripe. Once harvested, the green mangoes are peeled, thinly sliced, and sun-dried. The dried slices, which are light brown and resemble strips of woody bark, can be purchased whole and ground by the individual at home, but the majority of the slices processed in this way are ground into fine powder and sold as ready-made amchoor. It has a honey-like fragrance and a sour fruity flavour and is a tart pale-beige-to-brownish powder. It is used in dishes where acidity is required, in stir fried vegetable dishes, soups, curries, and to tenderize meat and poultry. It is used to add a fruit flavour without adding moisture, or as a souring agent, and lends an acidic taste to the foods.

Source: Wikipedia