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Broccoli Casserole in the Crock Pot

This Broccoli Casserole in the Crock Pot is a rich, cheesy side dish that’s easy to prepare and perfect for busy weeknights or holiday meals. Made with fresh broccoli and a crispy fried onion topping, this slow cooker recipe features a homemade creamy sauce with fresh ingredients, creating a warm and satisfying addition to any table.

Using a slow cooker ensures the vegetables stays tender-crisp while allowing the flavors to meld beautifully without constant monitoring. Whether you serve this broccoli and cheese casserole at a family dinner or a holiday gathering, this dish is an effortless way to enjoy a classic comfort food.

A serving of cheesy broccoli casserole topped with fried onions on a white plate, next to a larger casserole dish of the same dish. The title "Broccoli Casserole in the Crock Pot" is overlaid on the image

This Slow Cooker Broccoli Casserole is a classic dish that is served with our meals regularly and makes an appearance for Easter and Christmas dinners, too. This green vegetable is a staple in our house and often used in casseroles like this Cheesy Broccoli Cauliflower Casserole, or my favorite, Broccoli and Cauliflower au Gratin with Ham.

Broccoli Casserole in Crock Pot

This broccoli casserole is made from scratch with simple ingredients and a crock pot for a fuss-free side dish. The creamy homemade sauce, made with sautéed onions, garlic, and a blend of seasonings, coats each piece of fresh broccoli for maximum flavor. Shredded cheddar cheese adds richness, while crispy fried onions bring a crunchy contrast.

Want to make this broccoli casserole a main meal? Try stirring in some cooked chicken or diced ham for dinner. You can also play around with different cheeses to create your own unique flavor combinations. Whether you stick to the classic recipe or get creative with additions, this dish is a guaranteed hit because it’s so easy to throw together and turns out delicious.

Timesaving Tips and Variations

Save time and customize this casserole with simple shortcuts and ingredient swaps. Whether you’re looking for quicker prep or alternative flavors, these tips will help streamline the process.

  • Use Pre-Cut Broccoli: Save prep time by using bagged, pre-washed florets.
  • Substitute Frozen Florets: You can use frozen but thaw it first. Drain any excess water. Reduce cooking time slightly.
  • Make the Sauce Ahead: Prepare the creamy sauce a day in advance and store it in the fridge.
  • Swap the Cheese: Try gouda or a blend for a different flavor.
  • Make it Gluten-Free: Use a 1:1 gluten-free flour substitute in the sauce.

These simple modifications can make the recipe even more convenient without losing the flavors. Use what you have on hand to create a dish that fits your needs.

broccoli and cheese on white plate

This recipe is also a great use for leftover meat. Broccoli casserole with ham leftover from Easter is a great addition to this dish. If you have rotisserie chicken left it would be delicious in this slow cooker recipe.

How do I store leftover broccoli casserole?

Let the casserole cool completely before transferring it to an airtight container. Store it in the refrigerator for up to three days to maintain freshness. When ready to enjoy again, reheat in the microwave in short intervals or warm it in the oven at 350°F until heated.

Can I make this ahead of time?

Yes! To save time, prepare the creamy sauce the day before and store in the refrigerator. When ready, mix it with the florets in the slow cooker and cook as directed in the recipe card. You may have to add a couple of minutes to the cooking time.

What can I substitute for fried onions?

If you don’t have fried onions or prefer a different topping, panko breadcrumbs, crushed Ritz crackers, or toasted almonds work well. Each option provides a crunchy contrast to the creamy casserole. For extra flavor, toss the breadcrumbs or crackers with melted butter before sprinkling them on top.

overhead view of slow cooker and plate with broccoli cheese bake

Can I use frozen broccoli?

Yes, frozen broccoli is a convenient option, but it cooks faster than fresh. Be sure to thaw the vegetables and drain excess water. To prevent it from becoming too soft, reduce the slow cooker time by about 30 minutes and check for doneness earlier.

Can I use Canned Soup?

If you prefer using canned soup, I suggest using a homemade cream of chicken soup, but if you do use canned, try to use lower sodium varities. Try cream of celery, cream of mushroom, or cream of broccoli soup can also be used for a different taste.

What to Serve with Crock Pot Broccoli Cheese Casserole?

Broccoli cheese casserole pairs well with a variety of mains and sides, making it a versatile addition to any meal. Whether you’re serving it for a holiday feast or a casual dinner, these suggested dishes are all worth a try.

These dishes provide a mix of textures and flavors to round out your meal and will be a satisfying and well-balanced plate.

overhead shot of casserole featuring broccoli

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What Tools do You Need to Make Crock Pot Broccoli Casserole?

To make Crock Pot Broccoli Casserole, you’ll need a few essential kitchen tools to ensure smooth preparation and even cooking. The items are available on Amazon as well as your favorite box stores.

Having the right tools makes the process easier and ensures the best results. With these essentials, you can prepare a perfectly cooked, flavorful meals with minimal cleanup.

Ingredients to Make This Broccoli Crock Pot Recipe

You’ll need basic, familiar ingredients to make this rich and cheesy slow cooker dish. Fresh florets, a made-from-scratch sauce, and crunchy toppings create a flavorful and hearty recipe.

  • unsalted butter
  • onion
  • garlic
  • flour
  • milk
  • salt and pepper
  • garlic powder
  • fresh broccoli pieces
  • shredded cheddar cheese
  • French fried onions
Ingredients for broccoli casserole

These ingredients create a homemade dish with deep, comforting flavors. Using fresh, simple components ensures a perfectly balanced texture and taste in every bite.

Directions for Broccoli Casserole with French Fried Onions

In a small saucepan over medium heat, melt the butter. Add the chopped onion and sauté until softened. Stir in the minced garlic and cook for an additional 30 seconds. Whisk the flour into the butter and onion mixture. Cook for 2-3 minutes, stirring constantly.

Saute onions and make roux in saucepan

Whisk in the milk until the sauce is smooth. Add the seasonings, and taste. Stir the sauce frequently and cook until it thickens. Lightly spray the inside of a 6-quart slow cooker. Add the florets to the prepared slow cooker.

cream sauce in pan and broccoli florets

Pour the thickened white sauce over the broccoli. Stir to coat everything with the sauce. Cover and cook on LOW for 1½ hours. Remove the lid and stir the mixture. Replace the cover and cook for an additional 30 minutes, or until the vegetables are tender-crisp. Note: Keep in mind that slow cookers can vary, so your cooking time might need adjustment.

add sauce to broccoli and cook in crockpot

Sprinkle the remaining ½ cup of cheese evenly over the top, followed by the crispy fried onions. Cook uncovered for 10 more minutes, or until the cheese on top is fully melted and bubbly. Serve.

top with cheese and fried onions and serve

This broccoli casserole with a white sauce is a simple, delicious way to enjoy a classic vegetable side dish without extra effort. Its creamy texture, cheesy goodness, and crispy topping make it a crowd-pleaser that fits any occasion.

easy crockpot casserole served on white plate
A serving of cheesy broccoli casserole with crispy fried onions sits on a white plate, with the remaining casserole in a black slow cooker in the background. The dish is placed on a white and black checkered kitchen towel, accompanied by two copper forks on a marble countertop.

Broccoli Casserole in Crock Pot

This Broccoli Casserole in the Crock Pot is a rich, cheesy side dish that’s easy to prepare and perfect for busy weeknights or holiday meals. 
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Course: Dinner
Cuisine: American
Keyword: broccoli casserole, crock pot, Slow cooker
Prep Time: 15 minutes
Cook Time: 2 hours 10 minutes
Total Time: 2 hours 25 minutes
Servings: 8 servings
Author: Lisa Kerhin

Equipment

Ingredients

  • 6 tablespoons unsalted butter
  • 1 small onion, diced
  • 3 cloves garlic, minced
  • 6 tablespoons flour
  • 3 cups milk
  • salt and pepper, to taste
  • 1 teaspoon garlic powder
  • 8 cups fresh broccoli florets
  • 2 cups shredded cheddar cheese, divided
  • cups French fried onions

Instructions

  • Melt butter in a saucepan over medium heat, then sauté onion until soft. Add garlic and cook for 30 seconds.
  • Whisk in flour and cook for 2–3 minutes, stirring constantly. Gradually whisk in milk until smooth, then add seasonings and cook until thickened.
  • Lightly spray a 6-quart slow cooker and add broccoli. Pour the sauce over and stir to coat. Cover and cook on LOW for 1½ hours.
    Stir, then cook for another 30 minutes until tender-crisp. Slow cookers can vary in cooking times, so check for doneness and adjust as needed.
  • Mix in 1½ cups of cheese, then top with the remaining cheese and fried onions. Cook uncovered for 10 minutes until the cheese melts. Serve warm.

Notes

  • Use Pre-Cut Florets: Bagged, washed florets cut down on prep time.
  • Frozen Works Too: Thaw and drain well, then reduce cook time slightly.
  • Prep the Sauce Early: Make it a day ahead and refrigerate.
  • Try Different Cheese: Swap in gouda or a blend for variety.
  • Add Protein: Mix in cooked chicken, ham, or bacon.
  • Gluten-Free Option: Use a 1:1 gluten-free flour substitute.

Nutritional Disclaimer

“Blogghetti” is not a dietician or nutritionist, and any nutritional information shared is an estimate. If calorie count and other nutritional values are important to you, we recommend running the ingredients through whichever online nutritional calculator you prefer. Calories and other nutritional values can vary quite a bit depending on which brands were used.

Tried this recipe?I hope you enjoy all the recipes I share with you, including this one! I hope you try it, enjoy it, comment and rate it, and share it with your friends and family!

Enjoy!

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