Heat the oven: Preheat to 400°F (200°C).
Grease a 9x13-inch baking dish.
Prep the cauliflower: Cut into small florets. You can steam until just tender (about 6–8 minutes) and drain well, or roast with a drizzle of olive oil, salt, and pepper for 18–20 minutes until lightly golden. Dry is key—excess moisture will make the bake watery.
Cook the bacon: Pan-fry until crisp, then crumble. Reserve a teaspoon of bacon fat if you like for extra flavor in the sauce.
Make the sauce: In a bowl, whisk softened cream cheese, sour cream, heavy cream, melted butter, garlic, smoked paprika, 1 cup shredded cheese, 1/2 the green onions, 1/2 the bacon, salt, and pepper.
Stir until smooth. If it’s too thick, splash in a little more cream.
Combine: Add the cooked cauliflower and chicken to the bowl and toss to coat evenly. Taste and adjust salt and pepper.
Assemble: Spread the mixture in your baking dish.
Top with the remaining 1 cup cheese.
Bake: Bake for 18–22 minutes until bubbling and the cheese is melted and lightly browned at the edges.
Finish and serve: Sprinkle with remaining bacon and green onions. Let rest 5 minutes so it sets, then scoop and serve warm.