Broccoli & Cauliflower Gratin Recipe

Ideal as a Thanksgiving side or as a dish for a weeknight family gathering, Broccoli and Cauliflower Gratin elevates traditional vegetable dishes. Full of tender vegetables mixed with irresistible cheesy goodness, a blend of broccoli and cauliflower is coated in an oh-so-creamy cheese sauce to create {the ultimate} comfort food dish. 

Whether you're planning a cozy family dinner or aiming to impress your dinner guests, this dish will be a crowd pleaser at your next gathering.  

A Few Key Ingredients:  

Broccoli – We recommend using fresh, not frozen, broccoli for this recipe.

Cheddar cheese – Extra sharp cheddar cheese gives this dish a {mild} kick.  

Cauliflower– Fresh cauliflower is the second star of this dish. 

Broccoli and Cauliflower Gratin is best served in a casserole dish. We recommend using our Signature White Ruffle Casserole Dish for both style and functionality, or, if you’re making a small portion, in our Signature White Ruffle Loaf Pan. If serving as an appetizer, be sure to set out salad plates, perfect for an individual serving size {but we won’t judge if you want seconds...or thirds}.  

When setting the table, place matching or complementary serving utensils by the dinnerware to complete the look. Don’t forget to set out napkins for easy cleanup {it gets cheesy!} 

Adults and kids alike will be asking for a second serving of this Broccoli and Cauliflower Gratin – now that's something to be thankful for! 

Broccoli & Cauliflower Gratin 

Serves 6 


  • 1 head cauliflower, cored and cut into florets 
  • 1 head broccoli, cut into florets 
  • 2 tbs butter 
  • 3 tbs all-purpose flour 
  • 1 1/4 cups skim milk 
  • 5 oz shredded extra-sharp cheddar cheese 
  • 2 tbs chopped fresh parsley 
  • 2 cloves garlic, chopped 
  • 2 tsp spicy mustard 
  • 1/4 tsp red pepper flakes 
  • 1 pinch nutmeg 
  • Salt and ground black pepper, to taste 


Preheat oven to 350 degrees 

Bring salted water to a boil in a saucepan. Cook cauliflower until easily pierced with a fork, about 5 minutes. Transfer cauliflower to a baking dish with slotted spoon. Cook broccoli until easily pierced with a fork, about 2 minutes. Transfer broccoli to baking dish with slotted spoon. 

Melt butter in a saucepan over medium heat. Add flour and whisk until beginning to brown, about 2 minutes. Whisk in milk and bring to a boil. Simmer, whisking constantly, until sauce is smooth and thickened, about 2 minutes more. Remove from heat; gradually whisk in 4 oz Cheddar cheese. Stir in parsley, garlic, mustard, red pepper flakes, and nutmeg. Season with salt and pepper.  

Pour sauce over cauliflower and broccoli; toss to coat. Sprinkle remaining cheddar cheese over cauliflower and broccoli. 

Bake in preheated oven for 10 minutes. Increase heat to broil; bake until bubbly and brown, about 5 minutes more. 

Serve It Up


This beautiful casserole dish features our classic white color with hand-painted brushstrokes, Laura's signature on the back, and large ruffles along the edge. 
Our Ruffle Best Bowl in Signature White features gently sloped edges, cream and white hand-painted brush strokes, and a perfect size for dozens of different uses.

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