Heat your oven. Set to 375°F (190°C).
Lightly grease a small baking dish (about 8x8 or similar). If you prefer the stovetop or slow cooker, see the variations below.
Soften the cream cheese. Let it sit at room temp for 10–15 minutes or microwave in short bursts until easily stirred. This makes mixing smoother and prevents lumps.
Mix the base. In a large bowl, combine cream cheese, buffalo sauce, ranch (or blue cheese) dressing, garlic powder, onion powder, and black pepper.
Stir until fully smooth. Taste and adjust heat with more buffalo sauce if you like.
Add the chicken. Fold in the shredded chicken until everything is evenly coated. You want sturdy shreds or small chunks so the dip stays scoopable.
Stir in the cheese. Mix in 1 cup of the shredded cheese.
Save the remaining 1/2 cup for the top. If using blue cheese crumbles, add half now and save half for garnishing after baking.
Transfer and top. Spread the mixture into your baking dish. Sprinkle the remaining shredded cheese over the top.
Bake. Bake for 18–22 minutes, until hot and bubbling around the edges and the cheese on top is melted.
If you want a golden top, broil for 1–2 minutes at the end, watching closely.
Finish and serve. Let it rest 5 minutes so it sets slightly. Top with green onions and the remaining blue cheese crumbles if using. Serve warm with your favorite dippers.