Ingredients:

3/4 cup Classic Coca-Cola
1/4 cup Worcestershire sauce
1/4 teaspoon ground red pepper
1 tablespoon vinegar
1-1/2 pounds boneless chuck roast
2 cloves garlic, minced
2 onions, chopped
1 teaspoon instant beef bouillon granules
1/2 teaspoon dry mustard
1/2 cup catsup
1/2 teaspoon chili powder
2 tablespoons butter

Methods:

In a bowl, combine Coca-Cola,Worcestershire,vinegar,garlic,bouillon granules,mustard,chili powder and red pepper. Save 1/2 cup of this for sauce. Cut roast to fit Crockpot.Place meat and onions into Crockpot and pour remaining liquid (minus saved 1/2 cup) over meat.Cover and cook on LOW for 10 to 12 hours or on HIGH for 5 to 6 hours. In a small pan, combine 1/2 cup saved liquid, catsup and butter. Heat. And serve with cooked meat, and pass the sauce.