Skip to Content

Roasted Broccoli Casserole

This Roasted Broccoli Casserole is a staple at our Thanksgiving and Christmas table. Make your own family tradition by whipping up a batch of this deliciously easy side dish.

Roasted Broccoli Casserole

Roasted Broccoli Casserole Recipe

This is one of my favorite holiday and potluck side dishes. I make this for Easter, Christmas, Thanksgiving, and pretty much any time I need to bring a side somewhere on an occasion where calorie counting is typically frowned upon. It is really easy to put together, and if you are even a small fan of broccoli – you’ll love it.

Get the most flavor out of this dish by roasting the broccoli before you put the casserole together. Drizzle it with some olive oil and a shake of salt and pepper in a 375°F oven or pellet grill until the tops turn brown. It takes about 8-10 minutes.

Why you’ll love it!

  • Creamy, cheesy broccoli with a crunchy top. What’s not to love?
  • This makes broccoli into something spectacular.
  • Easy to throw together!
  • This dish travels well, too. Across town or across the street, it’ll still be delicious when you get there.

Get all of our Broccoli Recipes here!

Roasted Broccoli Casserole

Roasted Broccoli Casserole Shopping List

Wondering if you have to hit the store? Here’s the list of items you’ll need to make this recipe. For specific amounts, please refer to the printable recipe card at the bottom of the post.

Please enable JavaScript in your browser to complete this form.


Get the recipe via email and join our newsletter!

I consent to joining the free OrWhateverYouDo newsletter
  • Broccoli florets
  • Olive oil
  • Salted butter
  • Onion
  • Flour
  • Whole milk
  • Dry mustard
  • Garlic powder
  • Salt
  • Shredded cheddar jack cheese
  • Ritz crackers

Try our Traeger Broccoli Chicken Divan too!

Roasted Broccoli Casserole

How to make Roasted Broccoli Casserole

This is just the overview so you can see what you’re actually getting into here. When you are cooking, you’ll want to use the full recipe at the bottom of the page.



Fire up the oven or pellet grill to 375°F.



Place the florets onto a roasting pan and drizzle with olive oil. Roast until the broccoli is starting to get a little bit browned on the tops.

Reduce the heat to 325°F once the broccoli comes out.


Make the sauce

Melt the butter in a saucepan and saute the onions. Whisk in the flour. Cook for a couple of minutes.

Whisk in the milk, dry mustard, garlic powder, and salt. Cook on medium-low until it is thickened.

Remove from the stove and stir in 1 cup cheese.



Put the roasted broccoli into a high-sided baking dish. Pour the cheese sauce over the top. Sprinkle the rest of the cheese on top.

Combine the melted butter and crushed crackers. Sprinkle over the cheese.

Roast for 30-35 minutes at 325°F.



Once the cheese is melted and the buttery crackers are toasted, remove from the oven and enjoy hot!

How about some Chicken Broccoli Stir Fry?

Roasted Broccoli Casserole

More Holiday Recipes To Love

Lots of great holiday recipes are below! From traditional dishes to your soon-to-be new favorites, you’ve got this holiday covered!

Roasted Broccoli Casserole
Yield: 8 people

Roasted Broccoli Casserole

Roasted Broccoli Casserole

This roasted broccoli casserole is perfect for your Thanksgiving or Christmas table. Smothered in a creamy sauce and covered with cheese, even the vegetable haters in your life will love this.

Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes


  • 5-6 cups fresh broccoli florets
  • 2 tablespoons olive oil
  • 1/2 cup salted butter
  • 1/4 cup diced onion
  • 1/3 cup flour
  • 3 cups whole milk
  • 1/2 teaspoon dry mustard
  • 1/4 teaspoon garlic powder
  • 1/2 teaspoon salt, or more to taste
  • 3-4 cups shredded cheddar jack cheese
  • 10-15 Ritz crackers, crushed
  • 3 tablespoons butter, melted


  1. Preheat oven to 375. Place broccoli on a large baking sheet and lightly drizzle with olive oil. Roast for 7-10 minutes, or until broccoli is starting to get a little brown in small spots. You don't want it fully cooked, but you want some roasty flavor.
  2. Melt butter in a medium saute pan. Add onion, and saute over medium low heat for 4-5 minutes. Whisk in flour, and reduce heat to low. Continue cooking for 5 minutes, stirring frequently.
  3. Add milk, dry mustard, garlic powder, and salt. Whisk to combine, and cook over medium-low heat until the mixture is slightly thickened. Remove from heat and stir in 1 cup of cheese.
  4. Place broccoli in a large baking pan. Pour cheese sauce over the top. Top with the rest of the cheese.
  5. Combine butter and melted butter. Sprinkle over the cheese, and bake at 325 for 30 minutes, or until the cheese is melted and bubbly and the broccoli is tender.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 631Total Fat: 45gSaturated Fat: 24gTrans Fat: 1gUnsaturated Fat: 16gCholesterol: 119mgSodium: 918mgCarbohydrates: 32gFiber: 11gSugar: 8gProtein: 31g

Love this recipe? Tell your friends!

Follow on Instagram for more!

Nicole Johnson

Nicole Johnson, a self-taught expert in grilling and outdoor cooking, launched Or Whatever You Do in 2010. Her blog, renowned for its comprehensive and creative outdoor cooking recipes, has garnered a vast audience of millions. Nicole's hands-on experience and passion for grilling shine through her work. Her husband, Jeremiah Johnson, also plays a pivotal role in recipe development, adding his culinary flair to the mix. Together, they form a dynamic duo, offering a rich and varied outdoor cooking experience to their followers.

Julia T

Saturday 25th of November 2023

“ combine butter and melted butter” but no mention of the ritz crackers. Did you mean combine Ritz crackers and melted butter?

Nicole Johnson

Saturday 25th of November 2023

Sure did! Whoops!

35 NEW Thanksgiving Side Dishes - Yellow Bliss Road

Sunday 9th of October 2016

[…] Roasted Broccoli Casserole […]

Sarah Mueller

Wednesday 7th of October 2015

Looks yummy! Your link to the wood board links to W3Schools - just thought you'd like to know.

Nicole Johnson

Wednesday 7th of October 2015

Thank you Sarah!! I fixed the link. I am not sure how that happened! Its fixed now.

Nancy P.@thebittersideofsweet

Monday 27th of April 2015

This is the ultimate side dish! Sounds amazing!

Cate | Chez CateyLou

Sunday 26th of April 2015

I love broccoli, and smothering it with cheese makes it even better! I love the idea of roasting the broccoli first, great flavor! Also, thanks for the tip on the boards. Going to check that out now!

Skip to Recipe