Cauliflower Au Gratin

Cauliflower au gratin takes cauliflower to the next level, turning it into a creamy, cheesy casserole bursting with flavor. Tender cauliflower pieces are coated in a velvety cheese sauce, creating a comforting dish that comes together in under an hour using everyday pantry staples.

Course Sides

Cuisine American

Keyword cauliflower, holiday side dish, potatoes au gratin, vegetables side dish

Prep Time 10

Cook Time 40

Servings

Calories 333kcal

Author Wendie

Equipment

1 skillet

Ingredients

8-10 cups cauliflower florets
2 tablespoon olive oil
4 tablespoons butter
1 cup chopped onion
2 cloves garlic minced
2 tablespoon all purpose flour
½ teaspoon dry mustard
½ teaspoon salt
¼ teaspoon black pepper
1 ½ cups milk
4 ounces cream cheese
1 1/2 cups shredded gruyere cheese
1 cup shredded sharp cheddar cheese divided
Salt and pepper to taste

Instructions

Preheat the oven to 400 degrees. Rinse the cauliflower and break into 1 ½ inch bite sized pieces. Place on a baking sheet and toss with olive oil until coated.
Bake for 12-15 minutes or just until fork tender.
Heat an oven safe skillet on medium high heat and add the butter, diced onions and cook just until soft about 2-3 minutes, Add in the garlic and cook another 30 seconds until fragrant.
Sprinkle in the flour and cook about 1-2 minutes to cook the flour a bit.
Whisk in the milk until smooth, bring to a simmer and reduce heat to low.
Whisk in the mustard powder, salt, pepper and cream cheese. Simmer on low until cream cheese is melted.
Whisk in the shredded cheese reserving ½ cup of cheddar for the top.
Add in the roasted cauliflower and toss until coated. Top with remaining cheese and bake for 15-20 minutes. Or until hot and bubble.
Add more salt and pepper to taste if needed.

Notes

Gouda, mozzarella, cheddar, and jack cheese can all be used instead of Gruyere.

Broccoli can be used instead of cauliflower and try a mixture.

Frozen cauliflower can be used if you prefer, just make sure it is thawed and any extra water is strained. You can skip the roasting step if you use frozen.

If you don’t have an oven-safe skillet transfer everything to a 9x9 baking dish.

Nutrition