Loaded Cauliflower Broccoli Casserole with Bacon is the ultimate comfort food for anyone on a low-carb or keto diet. It’s cheesy, creamy, and packed with flavor thanks to the crispy bacon and perfectly roasted vegetables. Whether you’re looking for a satisfying side dish or a standalone weeknight meal, this casserole checks all the boxes—easy to make, filling, and kid-friendly.

If you’re trying to eat more vegetables without compromising taste, this recipe makes it incredibly easy. Both cauliflower and broccoli are part of the cruciferous vegetable family, known for their rich nutrient profile. Learn more about the health benefits of cruciferous vegetables and why they deserve a permanent spot in your meal rotation.

This dish also aligns beautifully with ketogenic dietary principles. With a combination of high-fat ingredients and minimal carbs, it supports blood sugar stability and satiety. If you’re just getting started, here’s a great guide to ketogenic diet principles that explains how meals like this fit into a low-carb lifestyle.

Ingredients Breakdown

Here’s what you’ll need for this loaded casserole:

½ large head cauliflower, cut into florets
½ large head broccoli, cut into florets
8 slices of crispy bacon, chopped
½ cup sour cream
½ cup cream cheese, softened
1 tablespoon mayonnaise (optional)
¼ teaspoon black pepper
2 cups shredded cheese mix (cheddar and Monterey Jack)
3 tablespoons chopped parsley (for garnish)

Optional Substitutions

Gouda or Gruyère instead of cheddar
Add diced carrots or celery for texture
Use all cauliflower or all broccoli depending on preference
Frozen veggies can be used but should be thawed and drained to avoid excess water

Tools You’ll Need

Baking dish (preferably glass or ceramic)
Mixing bowls
Steamer or microwave-safe bowl
Foil
Oven

Glass baking dishes work best for even heat distribution. Not sure why? Here’s an explanation of why glass bakeware is best for casseroles.

Step-by-Step Instructions

Preheat oven to 370°F (190°C).
Fry bacon in a skillet until crisp. Drain on paper towels and crumble.
Steam or microwave broccoli and cauliflower florets until tender (about 15–20 mins steaming or 7–8 mins in microwave with water).
In a large bowl, mix sour cream, cream cheese, mayonnaise (if using), and black pepper until smooth.
Add steamed vegetables, half the bacon, 1 cup of shredded cheese, and half the parsley. Mix well.
Pour mixture into a greased baking dish. Top with remaining cheese and bacon.
Cover with foil and bake for 20 minutes. Remove foil and bake an additional 5–10 minutes until cheese is bubbly and golden.
Garnish with remaining parsley and serve hot.

Tips for Best Results

Drain excess water from steamed or microwaved veggies to prevent a soggy texture
Use full-fat dairy for maximum creaminess
Avoid over-baking to keep vegetables tender but not mushy
Use frozen vegetables only if you thaw and press out the moisture
Mix cheese varieties for more depth (try sharp cheddar + Gruyère)

Making It Ahead of Time

Prepare everything up to the baking step
Cover and refrigerate for up to 24 hours
Remove from fridge 30 minutes before baking to bring it to room temperature
Bake as usual

How to Store, Reheat, and Freeze

Storage:

Store in an airtight container in the fridge for up to 3 days
Reheat in microwave or oven until warmed through

Freezing:

Freeze portions in airtight containers
Good for 2–3 months
Thaw overnight in fridge before reheating

Variations to Try

Vegetarian Version: Skip the bacon and add mushrooms or chopped nuts for richness
Spicy Twist: Add jalapeños or use pepper jack cheese
Chicken Version: Add cooked, shredded chicken for a one-pan dinner
Breakfast Casserole: Add scrambled eggs and bake as a keto breakfast bake

What to Serve with This Dish

This dish is very versatile. It can be a hearty side or a light main depending on what you pair it with:

Grilled or roasted chicken, steak, or pork chops
Light green salad or kale slaw
Keto garlic bread or cauliflower rice

Nutrition & Health Benefits

Low in carbohydrates, suitable for keto and diabetic diets
Rich in vitamins C, K, and fiber
Good source of healthy fats and protein
Gluten-free and grain-free

Frequently Asked Questions

Can I use frozen broccoli and cauliflower?
Yes, but make sure they are completely thawed and drained. Too much moisture can make your casserole watery.

Is cauliflower broccoli casserole keto?
Absolutely! This recipe is low in carbs, high in fats, and contains no grains—perfect for a keto-friendly meal.

What cheese works best?
Cheddar and Monterey Jack are popular, but you can also use Gouda, Gruyère, or Pepper Jack for added flavor.

How do I keep it from getting soggy?
Steam veggies until just tender and drain well. Avoid using too much sour cream or mayo, and never skip the bake-uncovered step.

Can I prep it the night before?
Yes! Assemble everything in the baking dish, cover, and refrigerate. Let it come to room temperature before baking.

How many calories are in this dish?
It depends on the exact ingredients, but a serving typically ranges from 250–350 calories per cup, mostly from fat and protein.

What meat goes best with this casserole?
Grilled meats like steak, chicken thighs, or pork loin pair well. For a vegetarian side, it also works great with tofu or eggs.

Final Thoughts

This loaded cauliflower broccoli casserole with bacon is everything a comfort food dish should be—hearty, cheesy, and packed with flavor while staying low in carbs. Whether you’re following a keto lifestyle or just want to add more veggies to your plate, this recipe delivers.