Prep the Crock Pot: Lightly spray the insert with cooking spray to help prevent sticking.
Add the Base: Place cream cheese (cubed for faster melting), buffalo sauce, ranch dressing, garlic powder, and onion powder in the crock pot.
Heat Gently: Cover and cook on Low for 45–60 minutes, stirring once, until the mixture is smooth and creamy.
Stir in Chicken: Fold in the shredded chicken and 1 cup of the cheese. If using blue cheese crumbles, add half now.
Slow Cook: Cover and cook on Low for 1–2 hours, stirring once or twice, until hot and bubbling around the edges.
Finish with Cheese: Sprinkle the remaining 1/2 cup shredded cheese on top, cover, and let it melt for 10–15 minutes. Add remaining blue cheese if using.
Garnish and Serve: Top with sliced green onions or chives.
Switch to Warm for serving and set out your dippers.