Preheat oven to 375 degrees. Line a large rimmed baking sheet with parchment paper. Spray lightly with non-stick cooking spray.
Add ground chicken breast, minced green onion, garlic, grated onion, egg yolk, breadcrumbs, salt, celery, 2 tablespoons dip, and hot sauce to a medium bowl. Use your hands to mix the ingredients together just until combined.
Use a small cookie scoop to form 1 1/2-inch balls of the chicken mixture. Wet hands with cold water to keep the chicken from sticking. Roll into even balls. Line on prepared baking sheet.
Bake the meatballs for 15 minutes or until golden brown and cooked through.
Remove from the oven and drizzle with remaining hot sauce. Serve with extra Buffalo Ranch Dip.