Chinese five spice powder (五香粉 or 
five spices powder or 
five-spice powder) is a convenient seasoning for 
Cantonese cuisine. It incorporates the five basic flavours of Chinese cooking - sweet, sour, bitter, pungent, and salty.
It consists of 
China Tung Hing cinnamon[?], powdered 
cassia[?] buds, powdered 
star anise and 
anise seed, 
ginger root, and ground 
cloves.
Another recipe for the powder consists of 
cinnamon, 
black pepper, 
cloves, 
fennel seed, and 
star anise.  It is used in most Cantonese roasted 
ducks, as well as 
beef stew.
The formula are based on the Chinese philosophy of balancing the yin and yang in food.
A pinch of the powder goes a long way.
Although used in restaurant cooking many Chinese households never use this spice in day-to-day cooking.
A versatile seasoned salt can be easily made by stir-frying common salt with five spices powder under low heat in a dry pan until the spice and salt are well mixed.
Here's a basic recipe for home-made five spice powder.
- Roast two teaspoons of Schezuan peppercorns in a dry frypan for about three minutes.
 - Grind the peppercorns in a pepper grinder or coffee grinder together with 8 star anise pods.
 - Strain the ground spices to remove any larger bits.
 - Mix together 1/2 teaspoon ground cloves, 1 tablespoon ground cinnamon, and 1 tablespoon ground fennel seeds.
 - Grind the completed mixture until it is a very fine powder.
 - Use sparingly, as it is extremely pungent.
 
see also the Wikipedia Cookbook
 
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