How to prepare Biryani Powder?

I want to prepare biryani masala powder in my home rather than using ready made.Please provide me with recipe.

I quickly found this on the internet:

To make biryani masala powder at home, follow this easy recipe:
Dry roast each spice sperately on a moderately medium flame till the spice gives faint aroma.
10 cardamom seeds
3 inch stick cinnamon
1 nutmeg
10 - 12 cloves
2 bay leaves
1 1/2 tsp fennel seeds
6 - 8 peppercorns
1 1/2 tbsp caraway seeds
5 - 8 strips mace
2 small star anise
Cool and grind to a powder. Store in a air tight container and use as required.

Very informative thread. I am very glad that, I have found your post.