Slow-Cooker Broccoli Casserole

This creamy, cheesy slow-cooker recipe transforms simple ingredients into something rich and comforting with minimal effort. Frozen broccoli becomes tender and flavorful as it simmers in a base of cream of celery soup and sharp cheddar, while a buttery cracker topping adds just the right crunch.

The flavor leans savory with a back note from Worcestershire, and the texture hits that tender-but-not-soggy sweet spot that slow-cooked vegetables sometimes miss. The cheddar doesn’t just melt—it infuses the whole dish with sharpness and depth, especially when you add the second handful at the end. And that topping? It turns golden and fragrant, with enough butter to make it feel indulgent.

This broccoli in the slow cooker is a dependable crowd-pleaser for weeknight dinners or holiday tables—just set it and forget it.

Slow-Cooker Broccoli Casserole Ingredients

• Frozen chopped broccoli
• Condensed cream of celery soup
• Shredded sharp cheddar cheese
• Chopped onion
• Worcestershire sauce
• Pepper
• Crushed butter-flavored crackers
• Butter

Directions

Step 1: Combine the base

In a large bowl, combine the broccoli, soup, 1 cup of the cheese, the onion, Worcestershire sauce and pepper.

Step 2: Layer the casserole in the slow cooker

Pour the mixture into a greased 3-quart slow cooker. Sprinkle the crushed crackers on top, then dot with the butter.

Step 3: Slow-cook, then finish with cheese

Cover and cook on high for 2 hours and 30 minutes to 3 hours. Sprinkle with the remaining cheese, and cook until the cheese is melted, about 10 minutes more.

How to Store Slow-Cooker Broccoli Casserole

Transfer any leftovers to an airtight food storage container and refrigerate for up to four days. Reheat leftovers in the microwave or a low oven until the casserole is warmed through and the cheese is melty again. Freezing leftovers isn’t recommended, as the texture of the broccoli and sauce may change.

Slow-Cooker Broccoli Casserole Tips

Can I bake slow-cooker broccoli casserole instead of using a slow cooker?

Yes, you can bake slow-cooker broccoli casserole in a 2-quart casserole dish. Cover the dish with foil and bake at 350°F for 30 to 35 minutes. Uncover, sprinkle with the remaining cheese and bake for 10 minutes more, until bubbly.

Can I make slow-cooker broccoli casserole without condensed soup?

You can cook broccoli in a slow cooker without the condensed soup by substituting a homemade cream soup mix.

What goes well with this slow-cooker broccoli casserole?

Crockpot broccoli casserole pairs well with simple proteins like roast chicken, pork chops or baked fish. It also makes a great addition to a holiday spread alongside stuffing, traditional mashed potatoes and glazed baby carrots.