For me it's the Amchur powder, the dried mango powder in it.
对我来说是 Amchur 粉，里面有芒果干粉。
英语百科
Amchoor
（重定向自Amchur）
Amchoor or aamchur, 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 produced in India, and is used to flavor foods and add the nutritional benefits of mangoes when the fresh fruit is out of season.