This easy broccoli cheese casserole recipe combines tender broccoli, creamy condensed mushroom soup, mayonnaise, egg, onion, and sharp cheddar under a crisp buttery cracker topping. It takes just 10–15 minutes to prepare and bakes at 350°F for 30–35 minutes, making a dependable 6–8 serving dinner side dish for busy weeknights, holidays, and family gatherings.
Every bite is rich, savory, and comforting, with soft broccoli coated in a smooth cheese sauce and a golden topping that adds just the right crunch. Use freshly shredded sharp cheddar and drain the thawed broccoli thoroughly for the best flavor and texture.
Jump to RecipeWhy You’ll Love This Recipe
This casserole is the kind of practical comfort food that works equally well beside roast chicken, baked ham, or a simple weeknight protein. The ingredients are familiar, the preparation is straightforward, and the oven does most of the work.
The condensed soup creates a creamy base without requiring a separate sauce, while mayonnaise adds richness and helps keep the broccoli moist. Sharp cheddar brings a fuller cheese flavor that stands up to the mild vegetables and buttery cracker crumbs.
If you enjoy vegetable-forward comfort food, you may also like these beef and broccoli stuffed peppers for another satisfying dinner idea.
Ingredients You’ll Need
The ingredient list is short, but each item has a useful role in the finished casserole. Frozen broccoli makes this recipe especially convenient because it is already trimmed into florets and can be kept on hand.
- Broccoli: Use 24 ounces of frozen florets, thawed completely and drained very well.
- Creamy base: A 10.5-ounce can of condensed cream of mushroom soup and 1 cup of mayonnaise create the rich sauce.
- Binder and flavor: One lightly beaten egg, 1/2 cup finely chopped yellow onion, 1/4 teaspoon salt, and 1/4 teaspoon black pepper bring structure and savory flavor.
- Cheese: Use 1 1/2 cups shredded sharp cheddar, dividing it between the filling and the top layer.
- Crunchy topping: Crushed buttery round crackers mixed with 4 tablespoons melted unsalted butter bake into a crisp golden crust.
Freshly shred the cheddar if possible. Pre-shredded cheese is convenient, but freshly shredded cheese generally melts more smoothly into the creamy mixture.
How to Make It Step-by-Step
Step 1: Heat your oven to 350°F and grease a 9-by-13-inch baking dish with butter or cooking spray. Set the dish aside while you prepare the broccoli and sauce mixture.
Step 2: Thaw the frozen broccoli completely, then place it in a colander to drain. Gently press out excess moisture or pat the florets dry with paper towels, because water left on the broccoli can make the casserole soupy.
Step 3: Add the condensed cream of mushroom soup, mayonnaise, lightly beaten egg, chopped yellow onion, salt, pepper, and 1 cup of shredded cheddar to a large bowl. Stir until the ingredients form a cohesive, creamy mixture with the onion distributed throughout.
Step 4: Fold the drained broccoli into the bowl instead of stirring too aggressively. Continue until each floret is coated, but keep enough texture that the broccoli remains distinct in every serving.
Step 5: Transfer the broccoli mixture to the greased baking dish and spread it evenly from corner to corner. An even layer helps the center heat at the same rate as the edges.
Step 6: Sprinkle the remaining 1/2 cup of shredded cheddar over the surface. This layer melts into the casserole and gives the cracker topping a cheesy base.
Step 7: Crush about 30 buttery round crackers into coarse crumbs, leaving a few slightly larger pieces for texture. Mix the crumbs with 4 tablespoons melted unsalted butter, then sprinkle them evenly over the cheese.
Step 8: Bake the casserole uncovered for 30–35 minutes. It is ready when the edges are bubbling, the center is hot, and the cracker topping is golden brown.
Step 9: Remove the dish from the oven and let it rest for 5–10 minutes before serving. The filling will thicken slightly as it cools, making neat, creamy portions easier to scoop.
Chef’s Tips for the Best Texture
The most important tip is to remove as much water from the thawed broccoli as possible. A colander helps with the first drain, while gentle pressing and paper towels finish the job without crushing the florets.
Do not cover the casserole while it bakes. An uncovered dish allows moisture to escape and helps the cracker topping become crisp instead of soft.
- For a tangier flavor, substitute sour cream for some or all of the mayonnaise. Using 1 cup sour cream creates a slightly tangier, less mayonnaise-forward casserole.
- Fresh broccoli also works, but blanch it for 2–3 minutes and drain it thoroughly before assembling the dish.
- Two 10-ounce packages of frozen broccoli may replace the single 24-ounce package.
- Cream of chicken or cream of cheddar soup can replace the cream of mushroom soup.
For another cheese-centered main dish to add to your dinner rotation, try this cheesy spinach and tomato stuffed chicken.
Make-Ahead, Storage, and Reheating
This recipe is well suited to advance preparation. Assemble the casserole several hours ahead, cover it, and refrigerate it until you are ready to bake.
When baking directly from the refrigerator, plan to add roughly 5–10 minutes to the baking time. Check that the center is hot and bubbling before removing the dish, and watch the cracker topping so it does not become too dark.
For leftovers, cover the cooled casserole and refrigerate it. Reheat individual portions until hot, or warm a larger amount in the oven so the topping has a chance to regain some crispness.
What to Serve with Broccoli Cheese Casserole
This rich casserole pairs best with simple dishes that balance its creamy texture. Serve it beside roasted chicken, baked pork, meatloaf, grilled steak, or a crisp green salad dressed with a bright vinaigrette.
Because the recipe yields 6–8 servings, it is also a useful side for a casual dinner party or holiday table. Keep the rest of the meal uncomplicated so the cheesy broccoli remains the comforting centerpiece of the plate.
If you are planning a full menu, consider a fresh seafood contrast such as this spicy salmon poke, or save a sweet cream-cheese treat such as this blueberry cream cheese pastry for dessert.
Easy Broccoli Cheese Casserole
Ingredients
Method
- Heat the oven to 350°F and grease a 9-by-13-inch baking dish. Thaw the broccoli completely, then drain it in a colander and pat it dry with paper towels.
- In a large bowl, stir together the condensed cream of mushroom soup, mayonnaise, lightly beaten egg, chopped onion, salt, pepper, and 1 cup of the shredded cheddar cheese.
- Fold the well-drained broccoli into the creamy mixture until the florets are evenly coated. Transfer everything to the prepared baking dish and spread it into an even layer.
- Sprinkle the remaining 1/2 cup shredded cheddar over the broccoli mixture. In a small bowl, combine the crushed buttery crackers with the melted butter.
- Sprinkle the buttered cracker crumbs evenly over the cheese. Bake the casserole uncovered for 30–35 minutes, until hot and bubbling with a golden-brown topping.
- Let the casserole rest for 5–10 minutes before serving. This short rest helps the creamy filling settle so it is easier to spoon and less likely to run.
Notes
Final Thoughts
This easy broccoli cheese casserole delivers creamy, cheesy comfort with very little effort. Thoroughly drained broccoli, freshly shredded cheddar, and a well-buttered cracker topping are the small details that make the finished dish especially satisfying.
Prepare it for a weeknight dinner, bring it to a potluck, or assemble it ahead for a holiday meal. For a seasonal dessert after dinner, this pumpkin roll with cream cheese filling makes a lovely finishing touch.
Let the casserole rest briefly after baking, then serve it while the cheese is warm, the broccoli is tender, and the cracker topping is crisp. It is a dependable recipe you will be happy to make again.
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