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Broccoli au gratin in a glass baking dish with a wooden spoon.

Broccoli Au Gratin

  • Total Time: 1 hour
  • Yield: 6-8 servings


  • 3 tablespoons unsalted butter
  • 3 tablespoons all-purpose flour
  • 11/2 cup whole milk
  • 11/2 teaspoons salt
  • 1/8 teaspoon grated nutmeg
  • 1/2 teaspoon pepper (more or less, to taste)
  • 1 (26 ounce) bag frozen baby broccoli florets
  • 11/2 cups shredded sharp cheddar cheese
  • 1/2 cup bread crumbs


  1. Preheat your oven to 450 degrees F. Grease a 2-quart casserole dish or spray with cooking spray.
  2. In a saucepan over medium heat, melt the butter. Slowly add flour while whisking. Whisk until smooth. Continue to whisk constantly for 1 minute.
  3. Add the milk, salt and nutmeg. Continue to whisk constantly until mixture comes to a boil.
  4. Reduce heat to low and simmer, stirring occasionally until the sauce is thickened, about 5-7 minutes. Add pepper and whisk again to combine. Remove sauce from heat and set aside.
  5. Prepare frozen broccoli florets according to package directions to cook them to a crisp-tender consistency. Drain broccoli florets in a colander.
  6. Place the broccoli in the greased casserole dish and sprinkle with half of the shredded cheese. Evenly drizzle white sauce on top of the broccoli and cheese. Sprinkle with the remaining cheese.
  7. Sprinkle evenly with bread crumbs. Bake (uncovered) until lightly browned and bubbly, approximately 20 minutes.


Adapted from Food Network

  • Prep Time: 20 mins
  • Cook Time: 40 mins