01 - Combine chicken breasts, broth, smoked paprika, garlic powder, onion powder, salt, and pepper in a medium saucepan. Bring to simmer over medium heat, cover, and cook 15-18 minutes until chicken is cooked through and tender.
02 - Transfer cooked chicken to a cutting board and shred using two forks. Discard excess cooking liquid.
03 - In the same saucepan, whisk together barbecue sauce, Worcestershire sauce, hot sauce, and brown sugar. Add shredded chicken and stir to coat thoroughly. Simmer over low heat for 5 minutes.
04 - Preheat oven to 350°F. Slice slider buns in half horizontally and arrange bottom halves on a baking sheet.
05 - Distribute sauced chicken evenly among bun bottoms. Top each with shredded cheddar cheese and crispy fried onions. Place bun tops over filling.
06 - Brush bun tops with melted butter. Bake for 8-10 minutes until cheese is melted and buns are golden and lightly toasted.
07 - Remove from oven and sprinkle with chopped parsley if desired. Serve immediately while hot.