Preheat your oven to 350°F (175°C). Grease an 8x8-inch baking dish or similar 2-quart casserole with butter or nonstick spray so the dip doesn’t stick.
nonstick spray or butter
In a large mixing bowl, add the softened cream cheese, sour cream, and ranch dressing. Beat with a hand mixer or stir firmly with a sturdy spatula until completely smooth with no large cream cheese lumps. If the cream cheese is cold, microwave it for 15–20 seconds to soften.
8 oz cream cheese, 1/2 cup sour cream, 1/2 cup ranch dressing
Stir in the buffalo hot sauce, garlic powder, onion powder, black pepper, and a small pinch of salt. Taste this creamy mixture and adjust the heat by adding more buffalo sauce if desired.
1/3–1/2 cup buffalo hot sauce, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/4 teaspoon black pepper, salt
Add the shredded chicken, 1/2 cup of the cheddar, 1/2 cup of the mozzarella, the blue cheese (if using), and most of the sliced green onions (reserve a spoonful for garnish). Stir until everything is evenly combined and the chicken is well coated. The mixture should be thick and scoopable; if it seems dry, add a spoonful more ranch.
2 1/2 cups cooked shredded chicken, 1 cup shredded cheddar cheese, 1 cup shredded mozzarella cheese, 1/4 cup crumbled blue cheese, 2 green onions
Spread the buffalo chicken mixture evenly into the prepared baking dish. Use a spatula to smooth the top so the cheese melts evenly.
Sprinkle the remaining 1/2 cup cheddar and 1/2 cup mozzarella evenly over the top to create a cheesy, bubbly layer when baked.
1 cup shredded cheddar cheese, 1 cup shredded mozzarella cheese
Bake in the preheated oven for 22–28 minutes, or until the edges are bubbling and the top is melted with small golden spots. For a more browned top, broil on LOW for 1–2 minutes, watching closely so it doesn’t burn.
Let the dip rest for about 5 minutes so it thickens slightly. Sprinkle with the reserved green onions and, if desired, a little extra blue cheese or a drizzle of buffalo sauce. Serve warm with tortilla chips, celery sticks, carrot sticks, toasted baguette slices, pita chips, or pretzel chips.
1/4 cup crumbled blue cheese, 2 green onions, tortilla chips, celery sticks, carrot sticks, toasted baguette slices, pita chips, or pretzel chips