Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1                    onion -- coarsely grated
   3                    garlic cloves -- finely chopped, up
                        -- to 5
     1/4  cup           Worcestershire sauce
   1      cup           ketchup
     1/4  cup           dark brown sugar
   2                    dried chipotle chilies -- up to 3
   1      cup           beer -- plus extra if
                        -- needed
   1      cup           water -- plus extra if
                        -- needed
   1      teaspoon      dry mustard
   1      teaspoon      mild red chili powder
   1      teaspoon      ground cumin
                        salt -- to taste
                        freshly-ground black pepper -- to taste
     1/4  cup           cider vinegar

Preparation:

Mix together the onion, garlic, Worcestershire sauce, ketchup, dark brown sugar, chipotle chilies, beer , water, mustard, chili powder, cumin, salt and pepper, and half the vinegar. Bring to a boil, then reduce the heat and simmer for 30 to 45 minutes, or until a thick sauce forms. If the mixture sticks or threatens to burn, add more water or beer. When the sauce is thick and flavorful, add the remaining vinegar and for seasoning. Remove from the heat. Slather this spicy, smoky sauce on ribs or steaks when they have almost finished cooking. Serve the remainder in a bowl for guests to help themselves. Comments: This sauce gets its kick from simmering the chipotle chili, a smoky dried chili that harbors the heat of hell. It is an ideal sauce to brush on ribs toward the end of cooking. Recipe Source: THE CLASSIC BARBECUE AND GRILL COOKBOOK by Marlena Spieler