Creamy Southern Broccoli Casserole Recipe

Southern Broccoli Casserole is cheesy, creamy, and perfectly delicious. The buttery cracker topping is crunchy and balances the soft broccoli and creamy sauce — a classic Southern side dish.

Marrying a Louisiana native taught me that the South loves bold flavors and casseroles. This cheesy broccoli casserole has become a favorite in our house. It recalls those broccoli-and-cheese microwave packets from childhood, upgraded with real cheese and a buttery cracker topping.

Classic green bean casserole was a holiday staple for both my family and my husband’s. This broccoli casserole is similarly comforting and simple to make. If you like casseroles like chicken and broccoli noodle bake, this one will fit right in — no canned soups required in every variation, but this version uses a condensed soup for ease and creaminess.

Casseroles are straightforward to prepare and travel well for potlucks or holidays. They’re an easy way to make vegetables appealing by combining them with cheese and a crunchy topping that everyone loves.

Although this broccoli casserole is full of broccoli and a great way to get more greens on the plate, it’s an indulgent side rather than a health food. The condensed soup, cheese, mayo, and buttery cracker topping give it a rich, comforting flavor that pairs especially well with Thanksgiving turkey or a holiday meal.

🧈 Buttery Ritz Cracker Crunchy Topping

• 2 tablespoons butter, cubed
• 15–20 Ritz crackers, roughly crushed (or substitute breadcrumbs, crushed crackers, or crispy fried onions)

🥦 Fresh or Frozen Broccoli?

Fresh broccoli gives the best texture; steam it briefly so it stays slightly firm. Frozen broccoli can be used if fully thawed and well drained, but avoid cooking it first since it tends to get mushy.

🥣 How to Make Cheesy Broccoli Casserole

Preheat the oven to 350°F (175°C).

1. In a skillet over medium-low heat, melt 3 tablespoons butter. Add the diced onion and cook gently until softened.
2. Partially cook the broccoli by steaming: microwave in a covered bowl with 3 tablespoons water for 4 minutes, or steam in a basket over simmering water for about 5 minutes. The broccoli should be tender-crisp; let it cool slightly.
3. Add the minced garlic to the onions and cook 1–2 minutes until fragrant, then remove the pan from heat.
4. In a large bowl, whisk together the condensed soup, mayonnaise, sour cream, eggs, lemon juice, salt, and pepper until smooth.
5. Fold in the broccoli, the onion-and-garlic mixture (including any butter from the pan), and all the cheese. Pour the filling into your casserole dish.
6. Crush the crackers by hand or with a rolling pin. Sprinkle the crushed crackers evenly over the casserole and dot with the cubed butter.
7. Bake, uncovered, for about 45 minutes, until heated through and the top is golden. Let rest 10–15 minutes before serving — it will be hot.

Can You Make This Ahead?

Yes. Prepare the filling (everything except the cracker topping) and store it in an airtight container in the refrigerator. When ready to bake, transfer the filling to your casserole dish, add the crushed crackers and butter, then bake as directed. This keeps casseroles from sitting in the oven cold and protects nicer baking dishes.

Broccoli Casserole Variations & Substitutions

• Change the soup: Use cream of chicken, cheddar, celery, or another condensed soup for a different flavor.
• Add vegetables: Mix in cauliflower or other mild vegetables.
• Make it a main dish: Stir in cooked chicken and rice to turn this into a hearty casserole.
• Double the recipe: Use a 9×13 baking pan when serving a crowd.

Yes. Fresh broccoli should be partially cooked (steamed briefly) so it’s tender but still textured. Frozen broccoli should be thawed and well drained.

Yes. Eggs help bind the filling and give the casserole a creamy, set texture.

How to Store Leftover Casserole

Cool the casserole to room temperature, then refrigerate in an airtight container or cover the dish tightly with foil. Leftovers keep for about four days.

Reheat in the oven or microwave. To revive the crunchy topping, briefly reheat in an air fryer or under a broiler for a minute or two, watching closely so it doesn’t burn.