In a pan roast the cumin seeds and coriander seeds on low flame.
Then add black pepper, ajwain (carom seeds), cinnamon, dry ginger, and cloves. Dry toast them until you get a nice aroma.
Take it out into a plate and cool down it.
Then add dry mint leaves, dry coriander leaves, and dry curry leaves. mix well.
Now in a mixture jar, add species mixture and grind it.
Sieve the grinded mixture.
Then add black salt, sindhana salt, thing, and amchur powder. Mix well.
Chaas masala is ready. store it in an airtight container.