Loaded Keto Mashed Cauliflower Casserole

I miss potatoes the most on the keto diet. Creamy mashed or french fried, potatoes are what dreams are made of for me. This keto mashed cauliflower casserole with bacon and cheese is the closest I’ve come to a low-carb version of a loaded mashed potato casserole. It’s rich, creamy, and satisfying—everything you want from a comfort-food side without the carbs.

This loaded mashed cauliflower casserole combines steamed cauliflower with cream cheese, sour cream, sharp white cheddar, and bacon, then bakes until bubbly and golden. It’s simple to prepare, gluten-free, and low-carb—perfect for weeknights, holidays, or any time you want a potato-style side without the starch.

Keto Cauliflower Casserole Ingredients

The ingredients mirror a classic loaded mashed potato casserole, substituting cauliflower for potatoes. Steam the cauliflower until tender, then mash or puree it with dairy and cheese before topping with bacon for a creamy, flavorful side that satisfies carb cravings.

Ingredients needed for this low-carb faux mashed potato casserole:

• 1 head cauliflower — Fresh is preferred; if using frozen, use at least 20 ounces and thaw before steaming.
• ½ tablespoon butter — Adds creaminess when pureeing.
• 4 ounces cream cheese — Use full-fat for best texture and flavor.
• 2 tablespoons sour cream — Brings tang and richness.
• 8 ounces white cheddar, shredded — Sharp white cheddar gives depth; Monterey Jack or pepper Jack are alternatives.
• ½ cup fried bacon pieces — Fresh-fried and crumbled bacon yields the best flavor, but prepackaged bacon pieces work in a pinch.
• Season salt, salt and pepper — Adjust to taste; a pinch of paprika is optional.

How to make Loaded Mashed Cauliflower Casserole

Start by steaming the cauliflower until it is very tender. If using an electric pressure cooker or an Instant Pot with a steamer basket, three minutes on high pressure for florets usually works well; otherwise steam on the stovetop until fork-tender.

Transfer the hot cauliflower to a food processor or blender and puree with a small pat of butter until silky smooth. If you prefer a chunkier texture, mash by hand. Pour the pureed cauliflower into a large bowl.

Stir in the cream cheese, sour cream, half of the shredded cheddar, and about three quarters of the bacon pieces. Season with salt, pepper, or your favorite seasoned salt blend to taste. Mix until fully combined and creamy.

Spread the cauliflower mixture into a greased 2-quart oven-safe casserole dish. Sprinkle the remaining shredded cheddar and the reserved bacon pieces evenly over the top.

Bake uncovered at 350°F (175°C) for 20–25 minutes, until the cheese is melted and the edges are golden and bubbly. Serve hot as a satisfying keto side dish.

Tips for making Keto Mashed Cauliflower Casserole with Bacon and Cheese

• Cook the cauliflower until fully tender before pureeing to avoid lumps and achieve a smooth, mashed-potato-like texture.
• If you don’t have time to fry bacon, prepared bacon pieces save time and still add the smoky flavor.
• Buy block cheddar and shred it yourself for better melting and fresher flavor compared with pre-shredded cheese.
• Adjust seasoning to taste. A seasoned salt or a pinch of garlic powder and paprika complements the cheese and bacon nicely.

Keto Side Dishes

Variety helps keep a low-carb plan enjoyable. Here are a few low-carb side ideas that pair well with this casserole: creamed spinach, air-fried zucchini chips, sautéed Brussels sprouts with bacon and onions, cheesy roasted cauliflower, or air-fried broccoli. These sides add texture and variety to a keto meal.

Keto Loaded Mashed Cauliflower Casserole

Ingredients

• 1 head cauliflower
• ½ tablespoon butter
• 8 ounces white cheddar, shredded (divide)
• ½ cup fried bacon pieces (divide)
• 4 ounces cream cheese
• 2 tablespoons sour cream
• 1 teaspoon seasoned salt (or salt and pepper to taste)

Instructions

1. Steam cauliflower florets until very tender, about 3–6 minutes depending on method.
2. Puree the hot cauliflower in a food processor or blender with the butter until smooth; transfer to a bowl.
3. Stir in half the shredded cheddar, about ¾ of the bacon, cream cheese, sour cream, and seasonings until creamy.
4. Spread the mixture in a greased 2-quart casserole dish. Top with remaining cheddar and bacon.
5. Bake uncovered at 350°F (175°C) for 20–25 minutes, until bubbly and golden around the edges. Serve hot.

Nutrition (per serving)

Calories: 291 kcal | Carbohydrates: 6 g | Protein: 17 g | Fat: 23 g | Saturated Fat: 14 g | Sodium: 1006 mg | Fiber: 2 g

Recipe adapted into a keto-friendly loaded mashed cauliflower casserole. Images and original recipe content retained where indicated.