In a large skillet, cover medium-high heat, add the olive oil and finely diced onion. Cook for 3 to 4 minutes, stirring occasionally, until the onions have softened.
1 tablespoon olive oil, ½ cup finely diced yellow or sweet onion
Add the ground chicken, kosher salt, and black pepper into the skillet. Cook and crumble the ground chicken until it's no longer pink; about 6 to 7 minutes. Drain or soak up any excess fat or liquid in the skillet.
1 pound ground chicken, 1 teaspoon kosher salt, ¼ teaspoon black pepper
Sprinkle the garlic powder and smoked paprika over the chicken. Stir and cook for 30 seconds to bring out the flavor of the seasonings.
½ teaspoon garlic powder, ½ teaspoon smoked paprika
Stir in the barbecue sauce, tomato sauce, Worcestershire sauce, and yellow mustard. Reduce the heat to medium-low and let the mixture simmer for 10 minutes, stirring occasionally, until the filling is thick, glossy, and saucy enough to spoon onto a bun without running off.
¾ cup BBQ sauce, ¼ cup tomato sauce, 1 tablespoon Worcestershire sauce, 2 teaspoons yellow mustard
Serve the BBQ chicken sloppy joe mixture onto toasted hamburger buns of choice. Enjoy!
5 hamburger buns or brioche buns