This keto-friendly broccoli and cauliflower bake is a creamy, cheesy side loaded with crispy bacon, sharp cheddar, and tangy sour cream. It’s an easy low-carb casserole that makes a flavorful alternative to potato dishes.
Preheat the oven to 370°F (about 187°C). Lightly spray or grease a baking dish and set aside.
In a large skillet over medium heat, cook the bacon until it is crisp. Transfer the cooked bacon to paper towels to drain, then crumble and set aside.
Steam the cauliflower and broccoli florets until they are fork-tender, about 15–20 minutes. Drain thoroughly to remove excess moisture.
In a large mixing bowl, whisk together the sour cream, mayonnaise, heavy cream, and black pepper until smooth.
Fold the steamed vegetables into the creamy mixture along with half of the crumbled bacon, the shredded sharp cheddar, and three tablespoons of the chopped chives. Stir gently to combine.
Transfer the mixture to the prepared baking dish. Sprinkle the shredded Colby/Monterey Jack evenly over the top and scatter the remaining crumbled bacon.
Cover the dish with foil and bake for 20 minutes. Remove the foil and continue baking another 5–10 minutes, until the cheese is bubbly and beginning to brown.