Preheat the oven: Set to 375°F (190°C). Lightly grease a 9x13-inch baking dish with olive oil or butter.
Cook the bacon: If you haven’t already, cook bacon until crisp.
Cool and crumble. Set aside.
Soften the cream cheese: Microwave for 15–20 seconds or let it sit at room temperature so it mixes easily.
Make the sauce: In a large bowl, combine cream cheese, sour cream, mayonnaise, garlic, Italian seasoning, smoked paprika, red pepper flakes, 1 cup cheddar, and 1/2 cup mozzarella. Stir until smooth.
Season with salt and pepper.
Add the chicken: Fold in the shredded chicken, half the bacon, and half the green onions. Mix until evenly coated.
Assemble: Spread the mixture into the prepared baking dish. Top with remaining cheddar and mozzarella.
Bake: Place on the center rack and bake for 18–22 minutes, or until the cheese is melted and the edges are bubbly.
Finish and rest: Sprinkle remaining bacon and green onions on top.
Let it rest for 5 minutes to set.
Garnish and serve: Add chopped parsley if you like. Serve hot with a side salad or steamed greens.