Recipe: Truffled Cauliflower Gratin

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Truffled Cauliflower Gratin Feature - updatedA wonderfully decadent side dish without an overpowering flavor, this gratin will impress company as well as have the kids asking for seconds. We used panko bread crumbs in the Olive This! kitchen for some extra crunch.


  • 1 large head cauliflower
  • 3 tablespoons unsalted butter, divided
  • 1 ½ teaspoons Olive This! White Truffle Oil
  • 3 tablespoons all purpose flour
  • 1 cup hot milk
  • 1 cup hot half & half
  • ½ teaspoon freshly ground black pepper
  • 1 cup freshly grated Gruyere cheese, divided
  • ½ cup freshly grated Parmesan
  • ½ cup fresh bread crumbs
  • Kosher salt and fresh ground pepper to taste
  • Chopped parsley for a garnish


Preheat the oven to 375 degrees F.

Chop the head of cauliflower into florets. Sprinkle the florets with salt and steam for 8 minutes until slightly tender but still firm. In a heavy sauce pan over medium heat, melt the 2 tablespoons of butter. Gradually whisk the flour in to the melted butter until no dry spots remain. Pour the hot milk and hot half and half into the butter-flour mixture, whisking constantly until it comes to a boil. Continue whisking constantly for 1 minute until thickened and then remove from heat.

Add 1 teaspoon of salt, fresh ground pepper to taste, 1 teaspoon of white truffle oil, 1/2 cup of the Gruyere, and 1/2 cup of Parmesan cheese.

Brush the sides and bottom of a 2-3 quart shallow baking dish or casserole with olive oil or butter.

Place the drained cauliflower into the baking dish and pour the sauce evenly over the cauliflower. Combine the remaining tablespoon of butter (melted) with the remaining ½ teaspoon of white truffle oil.

Toss the butter and truffle oil with the bread crumbs and remaining 1/2 cup of Gruyere and sprinkle on top of the casserole. Sprinkle with more salt and pepper to taste. Bake for 25 to 30 minutes until the bread crumbs are golden brown and the casserole is bubbling.  Garnish with chopped parsley.

Serves 6


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5 thoughts on “Recipe: Truffled Cauliflower Gratin

  1. This was great and not as time consuming as it may sound. Everyone loved it and my friend asked for it again when I invited her for dinner tonight. Half the time as potatoes au gratin and better tasting. Thanks for a great addition to my recipe file.

    • That’s wonderful to hear, Helen. The good thing about this white truffle oil is ‘a little goes a long way’ so there’s enough in the bottle to make this often. We also have a good lobster pasta dish if you want to try something else with white truffle oil. Thanks for the great feedback and happy cooking!

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