Side Dishes
This McCormick green bean casserole recipe delivers the iconic crispy mushroom topping and creamy green bean mixture that’s been a holiday favorite for decades.
The secret lies in using McCormick’s garlic salt and onion soup mix to build deep, savory flavor while keeping the assembly simple enough for any home cook to master. I’ve perfected this version to ensure the topping stays perfectly golden and crunchy—no soggy corners here.
The beauty of this dish is its balance: tender green beans in a creamy mushroom sauce, topped with a buttery, crispy mushroom layer that holds its texture until every bite.
McCormick seasonings elevate the flavor without overpowering, making this a crowd-pleaser that feels both nostalgic and refined. It’s the kind of side that transforms a simple meal into a showstopper.
With just 30 minutes of prep and 35 minutes in the oven, you’ll have a classic casserole that’s ready for Thanksgiving tables, family dinners, or even a cozy weeknight. The key is baking it at the right temperature—375°F—to ensure the topping gets crispy while the filling stays creamy.
Trust me, the aroma alone will have everyone gathering around the table.
Serve it warm with roasted chicken or as a standalone dish for a satisfying meal. The best part? Leftovers reheat beautifully, so you’ll have seconds on hand. Let’s get started on this timeless recipe that brings comfort and crispy perfection to every bite.
Ingredients for mccormick green bean casserole
Nine simple ingredients, one iconic holiday dish—McCormick seasonings make all the difference.
| Ingredient | Amount | Notes |
|---|---|---|
| Fresh Green Beans 🥦 | 2 lbs | Trimmed, cut into 2-inch pieces |
| Canned Cream of Mushroom Soup 🍄 | 2 cans | 10.5 oz each, McCormick preferred |
| Milk 🥛 | ½ cup | Whole milk for creaminess |
| McCormick Garlic Salt 🧂 | 1 tbsp | The secret for deep flavor |
| McCormick Onion Soup Mix 🧅 | 1 tbsp | For savory depth |
| Canned Mushrooms 🍄 | 1 can | 14.5 oz, sliced, drained |
| Butter 🧈 | ½ cup | Unsalted, melted for topping |
| All-Purpose Flour 🌾 | ½ cup | For crispy topping |
| French Fried Onions 🧅 | 1 cup | For extra crunch |
| Sharp Cheddar Cheese 🧀 | 1 cup | Shredded, for cheesy flavor |
| Black Pepper 🌶️ | ½ tsp | Freshly ground for heat |
| Salt 🧂 | ½ tsp | Adjust to taste |
McCormick’s seasonings are the heart of this casserole. Grab the garlic salt and onion soup mix from the spice aisle—they’re the reason this tastes like grandma’s. For the green beans, fresh is best (the crunch makes a difference), but frozen works in a pinch. The canned mushrooms? Look for the sliced kind—it’s perfect for the topping. If you’re feeling fancy, swap the cheddar for a mix of cheddar and Parmesan for extra richness. And trust me, butter matters here—use the good stuff for that golden, crispy topping.
No McCormick seasonings? Substitute 1 tbsp garlic powder + 1 tbsp onion powder for the onion soup mix, and add an extra pinch of salt. Frozen green beans? Thaw and pat dry first—they’ll crisp up better. Short on French fried onions? Toast regular onion rings in the oven for 5 minutes at 375°F. The milk can be swapped for half-and-half if you want it extra creamy. And if you’re watching calories, reduce the butter to 0.375 cups—it’ll still taste amazing.
This casserole reheats beautifully—just cover it with foil and bake at 350°F for 15 minutes. Leftovers keep for 4-5 days in the fridge, and it freezes wonderfully for up to 3 months. I always make a double batch—one for dinner, one for lunches. The topping stays crispy for about 20 minutes after baking, so serve it fresh out of the oven. And if you’re serving at a party, make it in a disposable pan—no one wants to return your good baking dish.
Why You'll Love This Recipe
- One-Pan Magic: I swear by this recipe because it lives entirely in one dish—no chopping boards, no extra bowls, just green beans, soup, and a sprinkle of magic. The moment I mix in that creamy mushroom soup and milk, the garlic salt hits like a warm hug, and suddenly, dinner feels like a celebration without the fuss.
- Creamy-Garlicky Bliss: That creamy mushroom soup base? Chef’s kiss. The McCormick onion mix adds this deep, savory punch while the garlic salt keeps it bright and addictive. Honestly, the first time I tasted it, I wondered why I’d ever made anything else—it’s that good.
- Potluck Star: Between us, this is my secret weapon for potlucks, holiday dinners, or even a lazy Sunday. It’s hearty enough to feed a crowd but simple enough that I can throw it together in 20 minutes. (Yes, even on a Tuesday night.)
- Budget Comfort: I make this at least twice a month because it’s cheap, filling, and always hits the spot. Fresh green beans stretch with the soup and milk, and the McCormick seasonings make it taste like a restaurant dish. Plus, leftovers? They’re even better the next day—if they last that long.
Step-by-step instructions for crispy green bean casserole
Here's how to make the ultimate comfort dish with that perfect crispy topping you crave.
Prep and Blanch the Green Beans
Start by trimming the ends off the 2 lbs of fresh green beans and cutting them into 2-inch pieces. Spread them out on a large baking sheet and steam them in a pot of boiling water for exactly 3 minutes. You want them bright green and still slightly crisp—overcooking turns them mushy.
Drain immediately in a colander and plunge into ice water for 1 minute to stop the cooking process. This preserves their color and texture. Once cooled, transfer them to a large mixing bowl and set aside. The beans should be vibrant and hold their shape when you squeeze a piece between your fingers.
Make the Creamy Mushroom Sauce
In a separate bowl, whisk together the 2 cans of canned cream of mushroom soup, 0.5 cup milk, 1 tbsp McCormick garlic salt, and 1 tbsp McCormick onion soup mix until completely smooth. This blend creates the rich, savory foundation of your casserole.
Add the drained 1 can of sliced canned mushrooms to the soup mixture and stir well. The mushrooms will soften slightly but still maintain their shape. Pour this creamy mushroom mixture over the blanched green beans in the mixing bowl and toss gently to coat everything evenly. The beans should be fully enveloped in the sauce.
Assemble in a Baking Dish
Transfer the green bean mixture to a greased 9x13-inch baking dish. Spread it out evenly so the top will cook uniformly. Sprinkle the 1 cup of shredded sharp cheddar cheese evenly over the top, pressing it down lightly so it melts into the casserole rather than staying in clumps.
Here's where the magic happens: melt the 0.5 cup butter and mix it with the 0.5 cup all-purpose flour in a small bowl until you get a smooth paste. Spread this evenly over the cheese layer. The butter-flour mixture will create that signature crispy topping when baked.
Bake Until Bubbly and Golden
Preheat your oven to 375°F. Bake the casserole uncovered for 25 minutes until the top is bubbling and the edges are beginning to brown. This is where you'll get that perfect combination of creamy filling and crispy topping.
Remove from the oven and sprinkle the 1 cup French fried onions evenly over the top. Return to the oven for 5-7 minutes until the onions are golden brown and the entire topping is crispy. You're looking for that satisfying crunch when you press down gently—it should hold its shape but still be crisp.
Rest and Serve Warm
Let the casserole rest for 5 minutes after baking. This allows the filling to set slightly and makes it easier to serve. The cheese should be melted throughout, the green beans tender but still holding their shape, and that crispy topping should be irresistible.
Garnish with a sprinkle of 0.5 tsp black pepper and serve immediately. The contrast of creamy filling with crispy topping makes every bite perfect. This casserole tastes even better the next day, so you'll want to make extra!
Pro Tips For Making Mccormick Green Bean Casserole
- Trim and Blanch Beans: Cut the ends off those green beans—yes, even if they look perfect—and give them a quick blanch in boiling water for 2-3 minutes before assembling. I learned this the hard way when my beans stayed crunchy and sad after baking. The blanch softens them just enough to soak up the creamy mushroom sauce while keeping them from turning to mush.
- Mix Soups First: Stir together the cream of mushroom soup and milk before adding the onion and garlic soup mix. This prevents clumping—those little powdery granules hate being dumped dry into liquid. I used to ignore this, and my casserole always had weird grainy pockets. A quick whisk with a fork fixes it.
- Don’t Overmix the Topping: Once you’ve dumped the fried onions on top, resist the urge to stir them into the sauce. They’re supposed to stay crispy, not turn into a soggy blanket. Just spread them evenly with a spatula and let them do their thing in the oven. Trust me, your future self will dig into that crunchy layer without guilt.
- Bake Until Bubbly: The casserole’s done when the edges are golden and the center bubbles like a lazy hot spring—not when it smells done. I used to pull it out too early because I thought it’d keep cooking on the stovetop (it won’t). Give it 10-15 minutes past that first bubble, and the flavors meld properly. Patience here makes the dish.
Common mistakes when making your mccormick green bean casserole
Overcooked Green Beans
Blanching green beans for more than 3 minutes turns them mushy and waterlogged. I’ve ruined this dish multiple times by overcooking them—once, they were so soft they fell apart when I tried to spoon them.
The key is timing: exactly 3 minutes in boiling water, then an immediate ice bath. This keeps them bright green and slightly crisp, which is essential for the perfect texture. 🥦
Skipping the Ice Bath
Plunging blanched green beans into ice water stops the cooking process instantly, preserving their vibrant color and firm texture. I learned this the hard way when my casserole filling turned out dull and limp.
The ice bath also prevents the beans from continuing to cook while you assemble the dish. Don’t skip this step—it’s the secret to restaurant-quality results. ❄️
Uneven Topping Thickness
The butter-flour topping needs to be spread evenly for consistent crispiness. I’ve made the mistake of piling it thicker in some areas, leading to a soggy bottom and crispy top.
Use a spatula to spread the mixture in a thin, even layer over the cheese. This ensures every bite has that satisfying crunch without compromising the creamy filling below. 🧈
Baking at Wrong Temperature
Baking below 375°F results in a topping that’s greasy rather than crispy, while going above 400°F can burn the edges before the center is done. I once baked mine at 350°F for an hour, and the topping was sad and limp.
Stick to 375°F for 25 minutes—this is the sweet spot for that perfect golden-brown crust. 🌡️
Adding Onions Too Early
Sprinkling French fried onions before the final 5-7 minutes of baking causes them to soften instead of staying crisp. I’ve made this mistake and ended up with a mushy topping that loses its appeal.
Wait until the casserole is bubbling and nearly done before adding them—this ensures they get that satisfying crunch. 🧅
Overmixing the Topping
When combining melted butter and flour, overmixing creates a lumpy texture that won’t crisp up properly. I’ve turned the topping into a gloppy mess by overworking it.
Simply whisk until smooth—just enough to blend the ingredients without incorporating air. A smooth, even spread is key to that perfect crispy finish. 💡
Nutrition facts
Frequently asked questions
Can I make this casserole ahead of time?
Yes! Assemble the dish up to 24 hours ahead and refrigerate uncovered. When ready to bake, add 10-15 minutes to the baking time at 375°F to account for the cold start. The topping will still crisp beautifully, and the flavors meld even better overnight.
What if I don’t have French fried onions?
No problem! Toast regular sliced onions in the oven at 375°F for 5-7 minutes until golden and crispy. For extra crunch, sprinkle with a pinch of McCormick garlic salt before adding to the casserole.
Can I use frozen green beans instead of fresh?
Thaw and pat dry frozen green beans thoroughly before using. They’ll hold up well in the casserole, though fresh beans add a slightly better texture. If using frozen, reduce blanching time to 2 minutes to prevent mushiness.
Why does my topping get soggy?
Soggy topping usually means one of two things: either the butter-flour mixture was too thick or the onions were added too early. For crispiness, ensure your butter-flour paste is smooth but not greasy, and always add onions in the final 5-7 minutes of baking.
Can I make this dish in a smaller baking dish?
Yes, but adjust the baking time. For a 8x8-inch dish, reduce total baking time to 20 minutes (including the final onion step). The smaller surface area cooks faster, so keep an eye on it to avoid over-browning.