Prep the peppers: Heat the oven to 400°F (200°C). Slice peppers lengthwise, remove seeds and membranes, and place on a baking sheet cut-side up. Brush lightly with olive oil and season with a pinch of salt.
Soften the shells: Pre-bake the peppers for 10–12 minutes until slightly tender.
This step helps them cook through without getting watery later.
Warm the sauce base: In a small saucepan over low heat, combine Buffalo sauce and butter (if using). Heat until butter melts, then stir in garlic powder and onion powder. Taste and adjust heat or salt.
Build the filling: In a large bowl, mix shredded chicken, celery, green onions, carrot (if using), 3/4 cup shredded cheese, and blue cheese (if using).
Stir in the warm Buffalo sauce and the ranch or blue cheese dressing. Fold in rice or cauliflower rice if you want extra volume.
Season: Add salt and pepper to taste. The dressing and cheeses are salty, so go light and taste as you go.
Stuff the peppers: Spoon the filling into each pepper half, packing gently and mounding slightly on top.
Top with cheese: Sprinkle the remaining 1/4 cup shredded cheese over the peppers for a melty finish.
Bake: Return the tray to the oven and bake 12–15 minutes, or until the cheese is melted and the peppers are fork-tender but still holding their shape.
Finish and garnish: Let rest for 5 minutes.
Drizzle with a little extra Buffalo sauce or ranch if you like. Garnish with green onions and parsley.
Serve: Pair with crisp celery sticks, a simple green salad, or roasted potatoes. Enjoy warm.