Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      parts         salt
   4      parts         dark brown sugar
   2      parts         cumin, ground
   2      parts         black pepper, freshly ground
   2      parts         chili powder
   4      parts         paprika
   1      part          cayenne (optional)

Preparation:

Combine ingredients and store in an air-tight container. Apply rub to ribs and leave in refrigerator of several hours to overnight.