BBQ Beef in Crock Pot

1-2 1/2 lb. Boneless chuck roast

2 Medium onions, chopped

1 1/2 cups of Coca-Cola Classic

1/2 cup Worcestershire sauce

2 tablespoons Apple cider vinegar

4 cloves minced garlic

2 teaspoon Beef bouillon granules

1 teaspoon Dry mustard

1 teaspoon Chili powder

1/2 teaspoon Ground red pepper

1 cup Ketchup

4 teaspoons Butter

Combine roast and chopped onion in a crock pot. Combine soda and everything but the ketchup. Keep 1 cup of mixture in refrigerator. Pour the rest over the roast and onions. Cook on HIGH for 6 hours. If roast is tender before 6 hours is up, turn off the heat, otherwise it may dry out. Drain off the fat and onions and shred the roast with forks. Keep the meat warm while you combine the cup of soda mixture with the ketchup and butter in a small saucepan. Cook this mixture over medium heat, stirring constantly, until heated through. Serve the meat on buns or toast with the sauce mixed in or poured over the meat .