01 - Combine chicken breasts, broth, smoked paprika, garlic powder, onion powder, salt, and pepper in a medium saucepan. Bring to a simmer over medium heat, cover tightly, and cook for 15–18 minutes until chicken reaches an internal temperature of 165°F and shreds easily.
02 - Transfer cooked chicken to a cutting board or shallow dish. Use two forks to pull the meat apart into bite-sized shreds. Drain and discard the poaching liquid.
03 - Return the saucepan to low heat. Whisk together barbecue sauce, Worcestershire sauce, hot sauce if using, and brown sugar until the sugar dissolves completely, about 2 minutes.
04 - Add the shredded chicken to the sauce mixture. Stir thoroughly to coat every piece evenly. Simmer on low heat for 5 minutes, stirring occasionally, until the chicken absorbs the sauce and heats through completely.
05 - Preheat oven to 350°F. Slice slider buns horizontally. Arrange the bottom halves cut-side up on a large baking sheet, leaving slight space between each bun.
06 - Divide the sauced chicken evenly among the bun bottoms, approximately 1/3 cup per slider. Top each portion with a generous sprinkle of shredded cheddar cheese, followed by a layer of crispy fried onions.
07 - Place the bun tops over the filling. Brush the tops evenly with melted butter. Bake for 8–10 minutes until the cheese is fully melted and bubbly, and the bun tops are lightly golden.
08 - Remove from oven and let cool for 2–3 minutes. Sprinkle with fresh chopped parsley if desired. Serve immediately while hot.