If you are looking for the perfect cozy comfort food that brings together creamy richness, vibrant greens, and an unexpected crunchy topping, then this Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe is about to become your new favorite. It balances the fresh, tender broccoli with a luscious cheesy sauce and finishes with the addictive crunch of garlic butter pretzels that elevate every bite. Whether you’re making it for a family dinner or a potluck, this dish delivers warm, hearty flavors with a fun twist you simply can’t resist.

Ingredients You’ll Need
Gathering these straightforward, everyday ingredients will be a breeze, and each one plays a special role in building the delicious layers of flavor and texture in this casserole. From the fresh broccoli to the creamy cheddar cheese, everything works harmoniously to create this comforting dish.
- 1 pound broccoli florets: Fresh broccoli provides a tender yet slightly crisp base full of vibrant green and nutrients.
- 2 tablespoons olive oil: This helps roast the broccoli to perfect tenderness with a subtle fruity undertone.
- Salt and pepper to taste: Essential for seasoning both the broccoli and the cheesy sauce to bring out all the flavors.
- 1/4 cup unsalted butter: Adds creamy richness and is the foundation for the flavorful roux.
- 1 small onion, diced: Provides a sweet, aromatic depth to the sauce.
- 2 cloves garlic, minced: Infuses the dish with a warm, savory punch — and highlights the garlic notes in the pretzel topping.
- 1/4 cup all-purpose flour: Thickens the sauce into silky smooth perfection.
- 2 cups whole milk: A creamy base for the sauce that lends richness without overwhelming.
- 2 cups shredded cheddar cheese: Sharp and melty, this is what makes the casserole irresistible and cheesy.
- 1/4 teaspoon cayenne pepper (optional): Adds a subtle heat that brightens the cheddar flavor.
- 1 teaspoon Dijon mustard: Lifts the cheese sauce with a slight tangy complexity.
- 1 cup sour cream: Introduces a tangy creaminess that balances all the richness.
- 1/2 cup crushed garlic butter pretzel pieces: A uniquely crunchy topping that brings texture and garlicky goodness.
How to Make Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe
Step 1: Prep the Oven and Broccoli
Preheating your oven to 375°F sets the perfect stage for roasting. Tossing the broccoli florets with olive oil, salt, and pepper before roasting not only softens them but also caramelizes the edges, bringing out wonderful nuttiness and color that add dimension to the casserole.
Step 2: Roast the Broccoli
Spread the broccoli in a single layer on a baking sheet and roast for about 15 minutes. This short burst of roasting softens the broccoli without losing its structure, creating tender bites that hold up beautifully in the cheesy sauce.
Step 3: Sauté Onion and Garlic
While the broccoli roasts, melt unsalted butter in a large saucepan over medium heat. Adding diced onion and cooking until it’s soft releases sweetness that’s fundamental to building a flavorful sauce. Then, stir in minced garlic for just 30 seconds to awaken its aroma without burning.
Step 4: Make the Roux and Cheese Sauce
Sprinkle in the flour and stir continuously for a couple of minutes, ensuring no lumps form. Gradually whisk in whole milk, cooking until the mixture thickens into a creamy béchamel base. Then fold in shredded cheddar, cayenne pepper, and Dijon mustard until the sauce is luscious and cheese is fully melted. This sauce is the heart of the casserole, providing the creamy, rich texture that coats the broccoli beautifully.
Step 5: Combine Broccoli and Sour Cream
Remove the sauce from heat, then gently fold in the sour cream for a smooth tangy finish. Toss in the roasted broccoli florets, carefully mixing so each piece is perfectly coated in the cheese goodness without breaking apart.
Step 6: Assemble and Top with Pretzels
Pour the broccoli-cheddar mixture into the greased casserole dish, spreading evenly. Sprinkle the crushed garlic butter pretzel pieces generously on top. The pretzels add a surprisingly delicious crunch and a savory garlic kick that makes this casserole truly stand out.
Step 7: Bake Until Golden and Bubbly
Bake for 20 to 25 minutes until the top is golden and bubbling with cheesy warmth. This final step melds all the flavors together and crisps up the pretzel topping to a perfect contrast against the creamy interior.
Step 8: Let It Rest Before Serving
Allowing the casserole to stand for a few minutes helps it set slightly for cleaner slices and lets the flavors deepen, making every spoonful satisfyingly rich and delightful.
How to Serve Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe

Garnishes
Sprinkle freshly chopped parsley or chives on top just before serving to add a burst of fresh color and a mild oniony brightness that pairs perfectly with this creamy casserole.
Side Dishes
This casserole pairs wonderfully with simple, crisp salads or lighter roasted vegetables to balance its richness. A tangy coleslaw or a lemony arugula salad adds refreshing contrast while still letting the casserole shine.
Creative Ways to Present
Serve this casserole in individual ramekins for an elegant presentation at dinner parties or scoop generous portions into colorful bowls for a casual family meal. Adding a dollop of sour cream or a drizzle of hot sauce on top can customize each serving to personal taste.
Make Ahead and Storage
Storing Leftovers
Leftover casserole should be cooled completely and stored in an airtight container in the refrigerator. It will keep well for up to three days, making it perfect for quick lunches or easy weeknight dinners.
Freezing
This Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe also freezes beautifully. Wrap tightly with foil or place it in a freezer-safe container before freezing for up to two months. Thaw overnight in the fridge before reheating.
Reheating
Reheat leftovers in the oven at 350°F until warmed through to maintain the crispy pretzel topping. Alternatively, microwave portions covered with a damp paper towel for a quicker option, although the topping may soften.
FAQs
Can I use frozen broccoli instead of fresh?
Yes, frozen broccoli can be used if fresh isn’t available. Just thaw and drain it well to avoid extra moisture in the casserole, which can make it watery.
What if I don’t have garlic butter pretzels?
If garlic butter pretzels aren’t on hand, crushed regular pretzels tossed with melted garlic butter and a pinch of salt make an excellent homemade substitute.
Is there a way to make this casserole gluten-free?
Absolutely! Substitute all-purpose flour with a gluten-free flour blend or cornstarch for the roux, and check the pretzels for gluten-free options to keep the dish safe.
Can I make this recipe vegetarian?
This recipe is already vegetarian-friendly as it contains no meat. To make it vegan, substitute dairy products with plant-based alternatives and use vegan cheese.
How spicy is the cayenne pepper? Can I leave it out?
The cayenne pepper adds just a subtle warmth that enhances flavor without making the dish spicy; you can definitely skip it if you prefer no heat.
Final Thoughts
This Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe is a fantastic way to turn simple ingredients into a warm, comforting dish bursting with flavor and texture. I encourage you to dive in and try it—it might just become that go-to recipe for cozy nights, family gatherings, and anytime you crave a little cheesy, garlicky comfort on your plate.
Print
Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels Recipe
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 6 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
This Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzels is a comforting and flavorful bake featuring tender roasted broccoli mixed in a rich cheddar cheese sauce, topped with crunchy garlic butter pretzel pieces for a delightful contrast. Perfect as a side dish or a hearty vegetarian main, it combines creamy textures with a touch of spice and savory notes for a satisfying meal.
Ingredients
Vegetables
- 1 pound broccoli florets
Roasting and Seasoning
- 2 tablespoons olive oil
- Salt and pepper to taste
Sauce
- 1/4 cup unsalted butter
- 1 small onion, diced
- 2 cloves garlic, minced
- 1/4 cup all-purpose flour
- 2 cups whole milk
- 2 cups shredded cheddar cheese
- 1/4 teaspoon cayenne pepper (optional)
- 1 teaspoon Dijon mustard
- 1 cup sour cream
Topping
- 1/2 cup crushed garlic butter pretzel pieces
Instructions
- Preheat Oven and Prepare Dish: Preheat your oven to 375°F (190°C). Grease a 9×13 inch casserole dish to prevent sticking and ensure even cooking.
- Roast Broccoli: Toss the broccoli florets with olive oil, salt, and pepper until evenly coated. Spread them out on a baking sheet and roast in the preheated oven for about 15 minutes until the broccoli is tender and slightly caramelized.
- Sauté Onions: While the broccoli is roasting, melt the unsalted butter in a large saucepan over medium heat. Add the diced onion and cook, stirring occasionally, until softened and translucent, about 3-4 minutes.
- Add Garlic: Stir in the minced garlic and cook for another 30 seconds until fragrant, ensuring it does not burn.
- Create Roux: Whisk in the all-purpose flour and cook for 1-2 minutes, stirring constantly to eliminate any raw flour taste and prevent lumps.
- Make Cheese Sauce: Gradually whisk in the whole milk, maintaining a smooth texture without lumps. Continue cooking and stirring frequently until the mixture thickens to a creamy sauce. Add the shredded cheddar cheese, cayenne pepper (if using), and Dijon mustard. Stir until the cheese is completely melted and the sauce is smooth.
- Combine Ingredients: Remove the saucepan from heat and fold in the sour cream until well combined. Add the roasted broccoli and gently mix to coat each floret thoroughly with the cheese sauce.
- Assemble Casserole: Pour the broccoli and cheese mixture into the prepared casserole dish, spreading it evenly. Sprinkle the crushed garlic butter pretzel pieces evenly over the top for a crunchy, flavorful topping.
- Bake: Place the casserole in the preheated oven and bake for 20-25 minutes, or until the top is golden brown and bubbly.
- Serve: Allow the casserole to stand for a few minutes after baking to set. Serve warm as a delicious side dish or vegetarian entree.
Notes
- For extra spice, increase the cayenne pepper to 1/2 teaspoon or more according to your preference.
- Use sharp cheddar cheese for a more pronounced flavor.
- Crush pretzel pieces coarsely for a better texture contrast on top.
- This casserole can be prepared ahead of time and refrigerated before baking; just add 5 extra minutes to baking time if baking from cold.
- Substitute sour cream with Greek yogurt for a tangier but lighter variation.

