Green Bean Casserole Without Mushroom Soup has tender green beans in a creamy garlic sauce under a crisp layer of fried onions. It’s a holiday-table side dish when you want the familiar casserole texture without canned soup—or mushrooms.
How to make green bean casserole without mushroom soup: Blanch the beans, coat them in a butter-and-flour sauce made with broth and cream, then bake at 400°F for 23 to 25 minutes, until hot and bubbly.
Why You’ll Love It
- No mushrooms at all: You get a creamy casserole without mushroom soup or mushrooms.
- Crisp topping: French fried onions contrast with the tender, sauce-coated beans.
- Fresh-bean texture: A quick blanch followed by ice water keeps the beans from turning mushy.
- Ready in 45 minutes: The prep and baking fit into a manageable stretch of holiday cooking.
Ingredient Notes
Fresh green beans keep their snap best. They go from boiling water into ice water before you mix them with the sauce. I stick with fresh beans here because that blanch-and-chill step gives you control over their texture.
Butter and all-purpose flour start the sauce. Cook the flour in the seasoned butter before you add liquid, then whisk as you pour. You want a smooth sauce that will cling to the beans, not pockets of dry flour among them.
Heavy cream gives the broth-and-flour sauce its rich, creamy finish and helps it cling to every bean.
French fried onions go on top before the dish bakes. Have foil nearby so you can shield the topping if it colors faster than the casserole heats through. The onions should finish crisp and browned, not dark.
Ingredients
- 36 ounces fresh green beans
- 3 tablespoons unsalted butter
- 2 cloves garlic, minced
- 3 tablespoons all-purpose flour
- 3/4 cup chicken or vegetable broth
- 3/4 cup heavy cream
- 1 teaspoon salt, for the sauce; the blanching water also uses about 1 1/2 tablespoons
- 1/2 teaspoon black pepper
- 6 ounces French fried onions
How to Make Green Bean Casserole Without Mushroom Soup
1. Heat the oven. Preheat your oven to 400°F. Set out a 9-by-13-inch baking dish so it’s ready once the beans and sauce are combined.
2. Blanch the beans. Bring about 1 gallon of water and about 1 1/2 tablespoons of salt to a boil in a large pot. Add the green beans and boil for 5 minutes. Drain them, immediately submerge them in a bowl of ice water for a few minutes, then drain again before making the casserole.
3. Start the sauce. Melt the butter in a large skillet over medium to medium-high heat. Add the minced garlic and cook until softened, about 3 minutes; lower the heat if it browns too quickly. Add the 1 teaspoon salt and the black pepper, and cook for 1 minute.
4. Thicken the sauce. Stir in the flour and cook for 2 minutes. Slowly whisk in the broth until smooth, then slowly whisk in the heavy cream. Bring the sauce to a simmer and stir frequently until thickened, about 5 minutes. I pour the liquids slowly so I can keep the mixture smooth as it changes from a paste to a sauce.
5. Assemble. Stir the thickened sauce into the drained green beans until they’re coated. Transfer everything to the 9-by-13-inch baking dish and spread the French fried onions over the top.
6. Bake. Bake for 23 to 25 minutes, until the casserole is hot and bubbly and the center reaches 165°F on a food thermometer. Check the onions around 15 minutes and cover the dish with foil if they brown too quickly. Serve immediately.
The Cream Sauce That Replaces Mushroom Soup
The replacement is a sauce made from butter, flour, broth and heavy cream. The butter and flour form the base; the broth and cream turn it into a coating for the beans. You don’t add condensed soup, and you don’t add mushrooms either.
Watch the skillet rather than treating the simmer as a pause before assembly. After about 5 minutes of frequent stirring, the sauce should be noticeably thickened and smooth enough to coat the green beans. If it still looks thin, keep stirring it at a simmer until it thickens before you combine it with the beans.
That sauce is what makes the finished casserole creamy beneath its crisp onion top. You should be able to see individual green beans through the coating, with bubbly sauce around them when the dish comes out of the oven.
Tips for Success
Why are there flour lumps in my sauce?
You may see pale bits of flour after the broth goes in if the liquid is added faster than you can whisk it smooth. Start with the cooked butter-and-flour mixture, pour in the broth slowly and whisk until smooth before adding the cream. I take my time with that first pour; it’s easier than chasing lumps later.
Why does my casserole look watery?
Water left on the beans goes into the baking dish along with the sauce. Let the beans drain again after their ice-water bath, and look for a thickened sauce in the skillet before you combine them. Those are the points where you can keep extra liquid out of the assembled dish.
Why is my garlic getting too dark?
If the minced garlic starts browning quickly instead of simply softening, the skillet is too hot for that stage. Lower the heat while it cooks, then continue with the salt, pepper and flour. You want the garlic softened before the sauce ingredients go in.
Frequently Asked Questions
How do I keep the beans from getting mushy?
Move them straight from the boiling water into ice water after their 5-minute boil. The cold water stops the cooking, so the beans aren’t continuing to soften while you make the sauce. Drain them again before combining everything.
How do I keep the fried onions from browning too quickly?
Look at the topping around 15 minutes into baking rather than waiting for the casserole to finish. If the onions are already getting too dark, cover the dish with foil for the remaining baking time.
Can I use vegetable broth instead of chicken broth?
Yes. Use 3/4 cup of either chicken or vegetable broth in the sauce. The rest of the ingredients and the skillet steps stay the same.
Storage & Reheating
USDA FSIS says to refrigerate leftovers within 2 hours in shallow, covered containers and use them within 3 to 4 days. Reheat leftovers to 165°F, checking with a food thermometer; don’t use a slow cooker to reheat them. The cream sauce may not freeze well, so the refrigerator is the better place for leftovers you plan to eat soon.
What to Serve With It
Serve this casserole beside Ritz cracker chicken casserole, or add it to a spread with cheesy hamburger potato casserole without soup. For more green bean sides, try smothered green beans with potatoes, smothered green beans or Texas Roadhouse copycat green beans. For a hearty bean supper, there’s Crock Pot ham and beans.
Final Notes
I like to bring this to the table as soon as it comes out of the oven, while the onion topping is still crisp. If you make it, leave a question or tell me how it turned out in the comments.
Green Bean Casserole Without Mushroom Soup
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Ingredients
- 36 ounces green beans fresh
- 3 tablespoons butter unsalted
- 2 cloves garlic minced
- 3 tablespoons all-purpose flour
- 3/4 cup broth chicken or vegetable
- 3/4 cup heavy cream
- 1 teaspoon salt for the sauce; the blanching water also uses about 1 1/2 tablespoons
- 1/2 teaspoon black pepper
- 6 ounces French fried onions
Instructions
- Preheat the oven to 400°F. Set out a 9-by-13-inch baking dish.
- Bring about 1 gallon of water and about 1 1/2 tablespoons of salt to a boil in a large pot. Add the green beans and boil for 5 minutes. Drain, immediately submerge in a bowl of ice water for a few minutes, then drain again.
- Melt the butter in a large skillet over medium to medium-high heat. Add the minced garlic and cook until softened, about 3 minutes, lowering the heat if it browns too quickly. Add the 1 teaspoon salt and the pepper; cook for 1 minute.
- Stir in the flour and cook for 2 minutes. Slowly whisk in the broth until smooth, then slowly whisk in the heavy cream. Bring to a simmer and stir frequently until thickened, about 5 minutes.
- Stir the sauce into the drained green beans until coated. Transfer to a 9-by-13-inch baking dish and top with the French fried onions.
- Bake for 23 to 25 minutes, until hot and bubbly and the center reaches 165°F on a food thermometer. Check the onions around 15 minutes; cover the dish with foil if they brown too quickly. Serve immediately.
