Slow Cooker Barbecue Beef

3 tablespoons all-purpose flour

3 pounds chuck roast

15 ounces tomato sauce

½ cup chopped onion

⅓ cup brown sugar

2 cubes beef bouillon

1 ½ teaspoons chili powder

1 clove garlic, minced

1 teaspoon mustard powder

Rub the flour into the roast. Place roast in bottom of slow cooker. Pour in the tomato sauce, onion, brown sugar, bouillon, chili powder, garlic and mustard powder. Mix well.

Cover slow cooker and cook on high setting for 8 hours OR on low setting for 14 to 16 hours.