Ace High Barbeque Sauce

This is from a book of old cowboy recipes, collected by 'Wild Wes' Medley, the rodeo champion, and published by him as The Original Cowboy Cookbook.

1 cup strong black coffee
1 cup Worcestershire sauce
1 cup catsup
1/2 cup cider vinegar
1/2 cup brown sugar
3 tablespoons hot chile powder
2 teaspoons salt
2 cup chopped onions
1/4 cup chopped green chile peppers: jalapeno, serrano, habanero, etc.
6 cloves garlic, minced