Dry roast all ingredients on low flame for few minutes till a nice aroma rises.
Let it cool down.
Grind everything down to a fine powder and transfer the content on a dry large plate.
Transfer the content in an airtight container and store it in a cool place.
Always use a dry spoon to use this powder which will help in storing it for a longer time. Stored this way, the spices should stay fresh for about 3 months.