Chaat masala is a spice blend popular in Indian, Pakistani, and Bangladeshi cuisine, known for its tangy, spicy, and savory flavor. It's a key ingredient in various "chaat" dishes like pani puri and aloo tikki, but is also used to enhance other savory and even some sweet dishes. The blend typically includes a mix of spices like cumin, coriander, dried mango powder, black salt, and asafoetida.