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Easy Baked Cauliflower Gratin
5 from 39 votes

Easy Baked Cauliflower Gratin

This baked Cauliflower Gratin is an easy, cheesy, make-ahead side dish that's great for serving a crowd. A perfect recipe for the holidays!

Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins
Servings: 7 servings
Calories: 296 kcal
Cuisine: French

Ingredients

For the Filling:
  • 1 cauliflower trimmed and cut into florets (about 2 ½ lbs or 6-7 heaping cups, large head
  • 3 tablespoons butter plus more for greasing the dish
  • ¼ cup all-purpose flour
  • 1 ½ cups water reserved cooking water
  • ¼ cup heavy cream
  • 2 teaspoons kosher salt plus more to taste
  • black pepper freshly ground, to taste
  • ¼ teaspoon nutmeg fresh
  • 6 ounces gruyere cheese grated (about 3 cups), divided
For the Topping:
  • 3 tablespoons butter
  • 1 clove garlic finely minced
  • 1 ¼ cups panko breadcrumbs
  • 1 teaspoon thyme fresh leaves
  • salt to taste
  • black pepper to taste

Notes

  • *Use about 2 ½ lbs or 7 cups of frozen cauliflower.
  • Be careful not to overcook the cauliflower while boiling, it should still be slightly firm or al dente. The time will depend on the size of your florets - check them every minute or so with a fork. 
  • It's really important that the cauliflower is drained very well and does not have a lot of extra liquid before adding to the cheese sauce or it will be watery.
  • Use a deep dish pie plate or cast iron skillet in place of a casserole dish if desired.
  • This cauliflower gratin can be made entirely in advance. Reheat in a 350 degree F oven covered for about 15 minutes, then remove the cover and bake for another 10-15 minutes until bubbling around the sides.

Nutrition Information

Calories 296kcal (15%) Carbohydrates 16g (5%) Protein 11g (22%) Fat 22g (34%) Saturated Fat 13g (65%) Polyunsaturated Fat 1g (6%) Monounsaturated Fat 6g (30%) Trans Fat 0.4g (20%) Cholesterol 62mg (21%) Sodium 1021mg (43%) Potassium 306mg (7%) Fiber 2g (8%) Sugar 3g (6%) Vitamin A 669IU (13%) Vitamin C 40mg (44%) Calcium 295mg (30%) Iron 1mg (6%)

Nutrition Facts

Serving: 7 servings

Amount Per Serving

Calories 296

% Daily Value*

Calories 296kcal 15%
Carbohydrates 16g 5%
Protein 11g 22%
Fat 22g 34%
Saturated Fat 13g 65%
Polyunsaturated Fat 1g 6%
Monounsaturated Fat 6g 30%
Trans Fat 0.4g 20%
Cholesterol 62mg 21%
Sodium 1021mg 43%
Potassium 306mg 7%
Fiber 2g 8%
Sugar 3g 6%
Vitamin A 669IU 13%
Vitamin C 40mg 44%
Calcium 295mg 30%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.

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