Creamy 3-Ingredient Green Bean Casserole
This creamy 3-ingredient green bean casserole is the holiday side that takes almost no effort. You stir together canned green beans and cream of mushroom soup, top with crispy fried onions, and bake until bubbly.
It’s the version I keep coming back to when I want something comforting without a long ingredient list. The whole thing comes together in about 40 minutes, and it tastes like you fussed.
Why This Green Bean Casserole Stays in the Rotation
The cream of mushroom soup does all the heavy lifting. It coats every green bean, so you get a rich, savory spoonful without making a roux or measuring a single spice.
And the fried onions on top are the real draw. They get shatteringly crisp in the oven while the edges that tuck into the cream turn soft and almost jammy. It’s the contrast that keeps me scooping more.
Ingredients
- 2 (14.5 oz) cans cut green beans, drained: look for regular cut or French style, whichever you prefer
- 1 (10.5 oz) can cream of mushroom soup: use full fat for the creamiest texture
- 1 cup French fried onions: the canned crispy kind, divided
- Salt and black pepper: a small pinch of each brings the flavors together, but you can skip them
Variations / Substitutions
- Fresh green beans: use 1 pound blanched cut green beans instead of canned. Boil them for 3 minutes, then drain and pat dry so they don’t water down the casserole.
- Cream of chicken soup: swap the mushroom soup for the same amount of cream of chicken soup for a milder, slightly sweeter base.
- Homemade fried shallots: fry thin shallot rings in a little oil until golden, drain on paper towels, and use them in place of the canned onions.
- Add cheese: fold ½ cup shredded sharp cheddar into the bean mixture before baking for a cheesy twist.
For a from-scratch take, try my classic homemade green bean casserole.
How to Make Creamy 3-Ingredient Green Bean Casserole
Step 1: Mix the Casserole
Preheat your oven to 350°F (175°C). In a large bowl, stir together the 2 drained cans of green beans, the can of cream of mushroom soup, ½ cup of the fried onions, and a pinch each of salt and pepper. Keep the remaining ½ cup onions for the top.
The mixture will be thick and clumpy at first, then it loosens as you fold. Scrape it into an 8×8-inch or similar 2-quart baking dish and smooth the top with a spatula.
Step 2: Bake Until Bubbly
Slide the dish into the oven and bake for 25 minutes. At that point, pull it out and give the top the remaining ½ cup fried onions, scattering them evenly.
Return it to the oven and bake for another 5 to 10 minutes, until the onions are deep golden and the edges are bubbling. The sauce should be hot and thick enough that it stays put when you spoon into it.
Step 3: Scoop and Serve
Let the dish sit on a trivet for about 5 minutes right on the table. The hot casserole needs a moment to settle so the sauce won’t run all over the plate.
Scoop big spoonfuls onto plates, making sure every serving gets a pile of those crisp, dark onions from the top.
A Few Tips Before You Start
- Drain the beans well. Tipping the cans into a colander and shaking off the liquid keeps the casserole from going watery.
- Skip the milk. This recipe uses soup straight from the can so the sauce stays thick and coats the beans instead of pooling at the bottom.
- For extra crunch, add the onion topping during the last 5 minutes of baking only. Any earlier and they can soften too much.
- If you want a little more depth, stir a pinch of garlic powder or a splash of Worcestershire sauce into the bean mixture. Totally optional, but nice.
Storing Leftovers
- Refrigerate: store cooled leftovers in an airtight container for up to 3 days.
- Reheating: warm individual portions in the microwave or spread the whole thing in a baking dish and reheat at 350°F (175°C) for 10 minutes. The onions will lose some crunch, so add a fresh handful on top if you have extras.
What Goes Well With Green Bean Casserole
Roast turkey is the obvious choice because the creamy beans cut through lean white meat. Baked ham works just as well, its salty, sweet glaze playing off the savory mushroom sauce. For a weeknight, spoon it next to a simple meatloaf, and the whole plate feels like a holiday.
Frequently Asked Questions
Can I use fresh green beans?
Yes. Blanch 1 pound of trimmed, cut green beans in boiling water for 3 minutes, then drain and pat them very dry before mixing.
Can I assemble this the night before?
You can mix the beans, soup, and a little less than half the onions, cover, and refrigerate. The next day, top with the remaining onions and bake as directed, adding 5 to 7 minutes since it starts cold.
Is there a dairy-free version?
Most cream of mushroom soups contain dairy, but there are canned dairy-free condensed mushroom soups you can substitute one for one. The fried onions are usually dairy-free, but always check the label.
Creamy 3-Ingredient Green Bean Casserole Recipe
Ingredients
Method
- Preheat oven to 350°F (175°C). Mix the drained green beans, cream of mushroom soup, ½ cup fried onions, and a pinch of salt and pepper in a bowl. Transfer to a 2-quart baking dish.
- Bake for 25 minutes, then top with the remaining ½ cup fried onions. Bake 5 to 10 minutes more until golden and bubbly.
- Let the casserole rest for 5 minutes, then scoop onto plates and serve hot.
