Slow Cooker Chicken Recipe: The Best Pulled Chicken Sandwiches Serve slow cooker chicken sliders with your game day menu for instant smiles around the party 8 servings 3 cups onion, thinly sliced 1 teaspoon canola oil 1 ¾ pounds boneless, skinless, chicken breast halves 1 cup tomato sauce 2 tablespoons cider vinegar 2 tablespoons molasses 1 tablespoon mustard 1 teaspoon onion powder 1 teaspoon ground cumin ½ teaspoon garlic powder ½ teaspoon hot sauce 8 toasted hamburger buns