Keto Broccoli and Cauliflower Gratin

Comfort Food That Loves You Back

There’s something magical about comfort food — gooey cheese, warm flavors, and the kind of satisfaction that makes you close your eyes with the first bite. The problem? Many of these dishes are carb-heavy and don’t fit into a low-carb lifestyle.

Enter the Keto Broccoli and Cauliflower Gratin. It’s creamy, cheesy, hearty, and feels like indulgence in every bite — yet it’s perfectly keto-friendly. Instead of potatoes or pasta, fresh broccoli and cauliflower create the base, smothered in a luscious cream sauce and topped with a blanket of bubbling cheese.

Whether you’re serving it as a side dish for weeknight dinners, as part of a holiday spread, or even as the star of the meal with a side salad, this dish is one of those rare recipes that’s both guilt-free and crowd-pleasing.

Ingredients

• 3 cups broccoli florets (fresh or lightly steamed)
• 3 cups cauliflower florets (fresh or lightly steamed)
• 2 tablespoons unsalted butter
• 2 cloves garlic, minced
• 1 cup heavy cream
• 1/2 cup cream cheese, softened
• 1 teaspoon Dijon mustard
• 1/2 teaspoon paprika
• 1/2 teaspoon ground black pepper
• 1 teaspoon salt (adjust to taste)
• 1 1/2 cups shredded cheddar cheese (divided)
• 1/2 cup grated Parmesan cheese
• Fresh parsley for garnish

Instructions

1. Preheat the oven: Set to 375°F (190°C). Grease a medium baking dish with butter or non-stick spray.
2. Prepare the vegetables: Lightly steam or blanch the broccoli and cauliflower for 3–4 minutes until just tender but not mushy. Drain well and set aside.
3. Make the sauce: In a skillet, melt butter over medium heat. Add minced garlic and sauté until fragrant (about 1 minute). Pour in heavy cream, cream cheese, Dijon mustard, paprika, salt, and pepper. Whisk until smooth and creamy.
4. Add the cheese: Stir in 1 cup shredded cheddar and 1/4 cup Parmesan until melted and incorporated into the sauce.
5. Combine: Place broccoli and cauliflower florets in the baking dish. Pour the cheese sauce evenly over the top and gently stir to coat the vegetables.
6. Top it off: Sprinkle remaining cheddar and Parmesan over the dish.
7. Bake: Place in the oven for 20–25 minutes, or until the top is golden brown and bubbly.
8. Garnish & serve: Remove from oven, let cool for 5 minutes, then garnish with fresh parsley. Serve warm.

Why This Recipe Works

• Low-carb & keto-friendly: The perfect swap for potato-based gratins.
• Cheesy indulgence: Creamy sauce with two kinds of cheese for ultimate richness.
• Family-friendly: Kids won’t even notice they’re eating vegetables.
• Make-ahead option: Assemble in advance, refrigerate, and bake when ready.

Variations & Twists

• Spicy kick: Add a pinch of cayenne or red pepper flakes to the sauce.
• Protein boost: Stir in diced cooked chicken, bacon, or ham before baking.
• Cheese swap: Try Gruyère, Gouda, or Monterey Jack for different flavor profiles.
• Veggie variety: Mix in zucchini, mushrooms, or spinach for extra greens.

Keto Broccoli and Cauliflower Gratin

This Keto Broccoli and Cauliflower Gratin is the ultimate low-carb comfort food. With tender vegetables baked in a creamy, cheesy sauce, it’s a family-friendly dish that feels indulgent while staying perfectly keto-friendly.

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Prep Time 15 minutes mins

Cook Time 25 minutes mins

Total Time 40 minutes mins

Servings: 6 servings

Course: Side Dish

Cuisine: American, Low-Carb

Calories: 290

Ingredients Equipment Method Notes

Ingredients

  

• 3 cups broccoli florets fresh or lightly steamed
• 3 cups cauliflower florets fresh or lightly steamed
• 2 tbsp unsalted butter
• 2 cloves garlic minced
• 1 cup heavy cream
• 1/2 cup cream cheese softened
• 1 tsp Dijon mustard
• 1/2 tsp paprika
• 1/2 tsp black pepper
• 1 tsp salt adjust to taste
• 1 1/2 cups shredded cheddar cheese divided
• 1/2 cup grated Parmesan cheese
• fresh parsley for garnish

Equipment

• Baking dish
• Skillet
• Mixing bowls
• Whisk
• Measuring cups and spoons

Method

 

1. Preheat oven to 375°F (190°C). Grease a medium baking dish.
2. Lightly steam broccoli and cauliflower for 3–4 minutes, then drain.
3. In a skillet, melt butter and sauté garlic. Stir in cream, cream cheese, Dijon mustard, paprika, salt, and pepper until smooth.
4. Add 1 cup cheddar and 1/4 cup Parmesan, stirring until melted.
5. Place broccoli and cauliflower in baking dish, pour sauce over, and stir to coat.
6. Top with remaining cheddar and Parmesan.
7. Bake for 20–25 minutes until golden and bubbly.
8. Cool slightly, garnish with parsley, and serve.

Notes

Assemble ahead of time and refrigerate until ready to bake. For a crispier topping, broil for 2 minutes at the end.

Serving Suggestions

• Pair with grilled chicken or steak for a complete meal.
• Serve as a side dish for Thanksgiving or Christmas dinner.
• Enjoy it on its own with a fresh green salad for a lighter option.

Storage & Reheating Tips

• Refrigerate: Store leftovers in an airtight container for up to 4 days.
• Reheat: Warm in the oven at 350°F (175°C) until heated through.
• Freezing: Freeze before baking for up to 2 months. Thaw overnight in fridge, then bake as directed.

FAQ

Q: Can I use frozen broccoli and cauliflower?
Yes, just thaw and drain well to avoid excess moisture.

Q: How do I thicken the sauce without flour?
The cream cheese naturally thickens the sauce without carbs.

Q: Is this dish kid-approved?
Absolutely! The cheese sauce disguises the veggies perfectly.