Side Dishes
Betty Crocker's green bean casserole recipe brings back that comforting, crunch-topped nostalgia from holiday tables everywhere. This classic side dish combines tender green beans with a creamy mushroom sauce and crispy fried onions for a perfect balance of textures and flavors that never fails to impress.
I've recreated this timeless recipe with precise measurements and techniques to ensure every layer delivers that signature crunch and velvety sauce.
The secret to this recipe lies in the proper preparation of each component—sautéing the green beans just until tender, mixing the creamy sauce to the right consistency, and ensuring the fried onions get perfectly golden and crispy.
The traditional method uses cream of mushroom soup and milk for that signature creamy texture, but I'll also share some modern twists for those looking to adapt it to dietary preferences. This dish is foolproof and delivers restaurant-quality results every time.
By the time it comes out of the oven, you'll have a casserole with vibrant green beans, a rich creamy sauce, and a golden, crunchy onion topping that adds both texture and flavor.
The aroma alone will bring back memories of family gatherings, and the taste will remind everyone why this dish is a holiday staple. It's the perfect side to complement any main course, especially during the holiday season.
Whether you're serving it at a family gathering or simply enjoying a nostalgic meal at home, this green bean casserole is sure to become a tradition in your household. The recipe scales easily, so you can make it for a crowd or just a cozy dinner for two.
Let's get started on creating this timeless dish that brings warmth and comfort to every table.
Ingredients for betty crocker green bean casserole
Twelve simple ingredients bring back holiday nostalgia with every bite of this classic green bean casserole.
| Ingredient | Amount | Notes |
|---|---|---|
| Fresh Green Beans 🥦 | 2 lbs | Trimmed, cut into 2-inch pieces |
| Cream of Mushroom Soup 🍄 | 2 cans | Condensed, 10.5 oz each |
| Whole Milk 🥛 | 1 cup | Full-fat for creamy texture |
| Yellow Onion 🧅 | 1 whole | Medium, finely chopped |
| Garlic Cloves 🧄 | 3 cloves | Minced, fresh preferred |
| Butter 🧈 | ½ cup | Unsalted, cubed |
| All-Purpose Flour 🌾 | ¼ cup | For thickening sauce |
| Fried Onions 🧅 | 1 ½ cups | Store-bought or homemade |
| Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked |
| Salt 🧂 | 1 tsp | Kosher or sea salt |
| Parmesan Cheese 🧀 | ¼ cup | Freshly grated, optional |
The green beans are the foundation—fresh is ideal, but frozen works in a pinch (no thawing needed). Most grocery stores carry pre-trimmed beans for convenience, but if you're using fresh, trim the ends and cut into even 2-inch pieces for consistent cooking. Costco and Trader Joe's often have the best prices for bulk green beans, and their frozen varieties are just as reliable. For the onions, yellow onions offer the best balance of sweetness and sharpness when caramelized, but red onions add a subtle color contrast if you prefer. The garlic should be fresh—pre-minced garlic from jars lacks the aromatic punch this dish deserves.
No cream of mushroom soup? Substitute with a homemade roux—melt butter, whisk in flour, then add milk and sautéed mushrooms for depth. Short on fried onions? Crispy shallots or crushed potato chips (like kettle-cooked) add a similar crunch. For a lighter version, swap the milk for half-and-half or heavy cream, but the sauce will be slightly richer. The Parmesan is optional but adds a savory finish—use freshly grated for the best texture. If you're making this ahead, assemble the casserole, refrigerate overnight, then bake—this actually enhances the flavors.
This casserole reheats beautifully, but bake it fresh from the fridge for the best texture. Store leftovers covered in the refrigerator for up to 5 days, though the fried onions lose crispiness after day 3. For freezing, bake first, then portion into airtight containers—it keeps for 3 months. The sauce thickens as it cools, so you can adjust consistency by adding a splash of milk if needed. Double the recipe for holiday gatherings—it scales perfectly, and the extra portions make great leftovers for sandwiches or salads.
Why You'll Love This Recipe
- One-Pan Magic: I swear by this recipe because it’s the kind of dish that lives in my slow cooker or sheet pan while I do everything else. Sauté the onions and garlic, dump in the beans, soup, and milk—then walk away. The creamy mushroom sauce clings to every bean like it’s been hand-tended, and the crispy fried onions on top? That’s the easy part, not the fussy part.
- Umami Bomb: Between us, the cream of mushroom soup is the MVP here. It turns simple green beans into something rich and savory—like a hug in a casserole. The garlic and onion add depth, but it’s that soup that makes it dangerously good. Honestly, I’ve made this with store-bought soup and fresh ingredients, and both versions disappear faster than I can say “seconds.”
- Holiday Hack: This is my go-to for Thanksgiving, Christmas, or even a lazy Sunday dinner. It’s hearty enough to stand alongside turkey or roast chicken but light enough to feel like a treat. My in-laws think it’s fancy because of the crispy onions, but I know the secret—it’s the way the milk and soup marry together. (Yes, even on a Tuesday night.)
- Budget Leftovers: A single batch stretches for three meals, and the flavor only gets better as it sits. The creamy sauce thickens just right, and the beans stay tender—no soggy aftermath. I’ll be real: I often make double because it’s cheaper than takeout, and the kids beg for it the next day. That’s the kind of dish that earns its keep.
Step-by-step instructions for betty Crocker green bean casserole recipe
Here's the method for creating that iconic crunch-topped casserole everyone loves.
Prepare the Green Beans
Trim the ends from the 2 lbs of fresh green beans and cut them into 2-inch pieces. Spread them evenly on a large baking sheet and steam them for 8-10 minutes until they're bright green and tender-crisp. You'll know they're ready when they yield slightly to pressure but still have a bit of bite—this ensures they hold up during baking.
Drain the green beans thoroughly in a colander and transfer them to a large mixing bowl. Set aside while you prepare the sauce. If you're concerned about overcooking, steam them for the shorter time and check for tenderness before proceeding.
Make the Creamy Mushroom Sauce
In a medium saucepan, melt the 0.5 cup butter over medium heat. Add the 1 whole yellow onion and 3 cloves minced garlic, cooking for 3-4 minutes until the onion becomes translucent and the garlic is fragrant. Be careful not to let the garlic burn—it should just add aroma, not bitterness.
Stir in the 0.25 cup all-purpose flour and cook for 1-2 minutes until the mixture forms a smooth paste. Slowly whisk in the 2 cans cream of mushroom soup and 1 cup whole milk, ensuring no lumps form. Bring the mixture to a gentle simmer and cook for 5-7 minutes until it thickens slightly. Season with 1 tsp salt and 0.5 tsp ground black pepper. Remove from heat and set aside.
Combine Green Beans and Sauce
Pour the warm mushroom sauce over the steamed green beans in the mixing bowl. Gently toss until the green beans are evenly coated in the creamy sauce. The mixture should be well combined but still retain some texture—this ensures each bite has both the bean and sauce flavors. Taste and adjust seasoning if needed, adding a pinch more salt or pepper as necessary.
Transfer the green bean mixture to a 9x13-inch baking dish, spreading it evenly in a single layer. This even distribution helps create a consistent crunch-top texture when baked. Preheat your oven to 350°F while you prepare the topping.
Create the Crunch-Top Layer
In a small bowl, combine the 1.5 cups fried onions and 0.25 cup freshly grated parmesan cheese. Sprinkle this mixture evenly over the green bean mixture in the baking dish, pressing down gently to ensure good contact. The fried onions should cover the entire surface, creating that signature crispy topping we all love.
Bake uncovered for 25-30 minutes until the top is golden brown and the edges bubble slightly. The casserole is done when the sauce is set but still creamy, and the topping is crispy enough to stand up to a fork. Let it rest for 5-10 minutes before serving—this allows the layers to set properly.
Serve and Enjoy
Use a large spatula to carefully transfer the casserole to serving plates, ensuring you get that delicious crispy topping. The green beans should be tender but still hold their shape, and the sauce should be rich and creamy. Serve warm with crusty bread or as a side dish for your favorite holiday meal.
This casserole tastes best when served fresh, so I recommend making it just before serving. The flavors meld beautifully during the baking process, creating that comforting, nostalgic taste we all remember from family gatherings. Leftovers can be refrigerated for up to 3 days and reheated in the oven at 350°F for 10-15 minutes, covered with foil to prevent the topping from drying out.
Pro Tips For Making Betty Crocker Green Bean Casserole
- Blanch Beans First: Toss your green beans in boiling water for 3-4 minutes before assembling the casserole—this softens them just enough to absorb the sauce better without turning mushy. I learned this the hard way after serving a batch where half the beans were still crunchy while the rest dissolved into soup.
- Sauté Onions Low: Cook the onions and garlic at medium-low heat until they’re translucent, not browned—overcooking them turns the sauce bitter and overpowers the creamy mushroom flavor. Sounds weird, but it works: skip the color, keep the sweetness.
- Stir the Sauce: Whisk the cream of mushroom soup and milk before adding it to the beans—this prevents clumps that turn into lumps in your casserole. I used to pour it straight from the can, and every time, I ended up with a weird, grainy texture. Not worth the effort.
- Top Before Baking: Sprinkle the fried onions (or breadcrumbs) right after removing the casserole from the oven—this keeps them crispy instead of soggy. If you’re impatient like me, resist the urge to add them early; they’ll just turn into a sad, greasy mush.
Storing and reheating your leftovers
Refrigerator Storage
Store your green bean casserole in an airtight container with a lid to preserve moisture and texture. I use glass Pyrex dishes with snap-on lids for best results—they seal tightly and prevent the fried onions from absorbing fridge odors.
Keep it refrigerated for up to 3 days, though the crispiness of the onion topping starts to diminish after day 2. The sauce thickens as it cools, so you may need to add 1-2 tablespoons of milk when reheating for optimal creaminess. 🧊
Freezer Prep Tips
For long-term storage, bake the casserole first, then let it cool completely before transferring to freezer-safe containers or heavy-duty aluminum foil wrapped tightly. Label with the date—it freezes beautifully for up to 3 months.
I recommend portioning into individual servings so you can thaw just what you need. Leave ½-inch headspace in containers to prevent expansion cracks during freezing. 🧊
Oven Reheating
My preferred method is reheating in the oven to maintain that signature crunch. Preheat to 350°F, cover the casserole with aluminum foil, and bake for 15-20 minutes. Remove the foil for the last 5 minutes to crisp up the onion topping.
For extra moisture, add 2-3 tablespoons of water or milk before covering. The internal temperature should reach 165°F for food safety. ⏰
Microwave Method
For quick reheating, transfer a single serving to a microwave-safe dish and cover loosely with a paper towel. Heat on medium power (50%) for 2-3 minutes, stirring halfway.
Add 1 tablespoon of milk if the sauce looks dry. Avoid high power—it can make the onions soggy. This method works best for leftovers within 2 days of storage. 🔥
Reviving Crispiness
If your refrigerated casserole loses its crunch, broil it for 2-3 minutes at the end of reheating. Sprinkle 1 tablespoon of crushed potato chips or extra fried onions on top before broiling to restore that satisfying crunch.
For extra richness, top with a drizzle of melted butter and freshly grated parmesan before serving. This trick works wonders for restaurant-quality results at home. ✨
Make-Ahead Baking
Assemble the casserole completely, cover tightly, and refrigerate overnight before baking. This actually enhances the flavors as the ingredients meld. Bake straight from the fridge at 350°F for 5-10 minutes longer than usual—your oven will need time to recover from the cold.
This method is perfect for holiday prep when you want everything ready to go in the morning. 📅
Nutrition facts
Frequently asked questions
Why does my green bean casserole sauce get watery after baking?
The sauce may thin out if the green beans release too much moisture during baking. To fix this, ensure your beans are fully drained after steaming and consider adding 1 tablespoon of cornstarch to the sauce mixture before baking. Also, avoid overfilling the baking dish—use a 9x13-inch pan for proper heat distribution.
Can I make this casserole without cream of mushroom soup?
For a homemade version, sauté 1 cup sliced mushrooms in butter, then blend with 1 cup milk and 2 tablespoons flour to make a roux. Simmer until thickened, then season with salt and pepper. This adds depth and avoids canned soup's preservatives.
How do I keep the fried onion topping extra crispy?
Bake the casserole at 375°F instead of 350°F for the last 5 minutes to boost crispiness. For extra crunch, sprinkle 1 tablespoon of crushed potato chips or toasted breadcrumbs under the fried onions before baking. Avoid covering with foil during baking.
Is this casserole gluten-free?
Not traditionally, but you can adapt it! Use a gluten-free flour blend for thickening the sauce and ensure your fried onions are certified gluten-free. For extra crunch, try crispy fried shallots or gluten-free cornflakes instead of regular fried onions. Always check labels on canned soup for hidden gluten.
What's the best way to serve leftovers?
Reheat in the oven at 350°F for 15-20 minutes covered with foil, then uncover for the last 5 minutes to restore crispiness. For a quick fix, microwave a single serving with 1 tablespoon of milk covered loosely for 2 minutes at 50% power. Serve with a side of garlic bread to soak up any extra sauce.