Prep your oven and pan: Preheat the oven to 375°F (190°C). Grease a 9x13-inch casserole dish or similar baking pan.
Cook the bacon: In a skillet, cook bacon until crispy.
Drain on a paper towel and crumble. Reserve 1 tablespoon of bacon fat if you plan to sauté veggies.
Optional veggie step: If using broccoli or cauliflower, lightly sauté in butter or bacon fat for 3–4 minutes to soften slightly. If using zucchini, sauté just 2 minutes to avoid excess moisture.
Make the creamy base: In a large bowl, combine softened cream cheese, sour cream, and heavy cream.
Mix until smooth.
Season it: Stir in ranch seasoning, garlic powder, onion powder, smoked paprika, and a pinch of salt and pepper. Taste and adjust seasoning.
Add the stars: Fold in cooked chicken, half of the crumbled bacon, 1½ cups of the shredded cheddar, and any sautéed veggies. Mix until evenly coated.
Assemble the casserole: Spread the mixture into the prepared dish.
Top with the remaining 1/2 cup cheddar and the rest of the bacon.
Bake: Bake uncovered for 18–22 minutes, until hot and bubbly and the cheese is melted with lightly golden spots.
Finish and serve: Let it rest for 5 minutes to set. Garnish with sliced green onions. Serve as-is or with a crisp side salad.