Step 1: Preheat your oven to 375°F (190°C). Grease an 8×8 inch baking dish or a similar-sized oven-safe dish.
Step 2: In a large mixing bowl, combine the softened cream cheese, blue cheese dressing, and ranch dressing. Beat with a sturdy spoon or hand mixer until completely smooth and creamy.
Step 3: Stir in the buffalo sauce. Mix thoroughly until the sauce is fully incorporated and the mixture is a uniform orange color.
Step 4: Fold in the shredded cooked chicken, ensuring it is evenly coated with the creamy buffalo mixture.
Step 5: Transfer about two-thirds of the chicken mixture into the prepared baking dish, spreading it out evenly to form the base layer.
Step 6: Sprinkle half (1 cup) of the shredded cheddar cheese over the chicken mixture in the baking dish.
Step 7: Spoon the remaining chicken mixture over the cheddar cheese layer, spreading it out as evenly as possible.
Step 8: Top the dip generously with the remaining shredded cheddar cheese.
Step 9: Bake in the preheated oven for 20-25 minutes, or until the dip is hot, bubbly around the edges, and the cheese on top is melted and slightly golden. For extra browning, you can broil for the last 1-2 minutes, watching carefully.
Step 10: Remove from the oven and let it rest for 5-10 minutes before serving. Garnish with chopped fresh chives or green onions, if desired. Serve warm with celery sticks, carrot sticks, tortilla chips, or pita bread.