Blend guava juice, mint leaves in a blender until the mint leaves are well mixed.
Add chaat masala and blend for a couple of seconds.
Add chili flakes and blend for a couple of seconds.
Notes
I have used store bought guava juice.Do not over blend the mocktail after adding chaat masala and chili flakes as it will intensify their flavors in the drink and we want just the background taste of it. Serve this mocktail chilled.