Crockpot Cola Chicken

1 1/2 C cola
2 T rice wine vinegar
1 tsp. chicken boullion
1 tsp. chili powder
2 dashed of granulated garlic
1 tsp. dry mustard
1/2 tsp. crushed red pepper
2 medium onions, chopped
1 C ketchup
1/2 C Worcestershire sauce
2 T butter
2 lb. boneless, skinless chicken
In a saucepan combine all ingredients, but the chicken, simmer for 10-15 minute. In a crockpot place half of the sauce, then the chicken, and the rest of the sauce. Cook on high for 6-8 hours, serve with rolls.