Melt the ghee in a large skillet over medium-high heat. Add the curry leaves and fry until crisp and no longer sizzling, 1 to 2 minutes. Remove to a plate with a slotted spoon, leaving the warm oil behind in the pan.
Reduce the heat to low, then add the cashews to the ghee and cook, tossing frequently, until browned, 8 to 12 minutes.
Return the curry leaves to the skillet along with a few pinches of salt, the chili powder and chaat masala; mix well. Transfer to a large bowl to cool. Store in an airtight container.