Every Thanksgiving table has one dish nobody defends and everybody eats. Green bean casserole is it. The version most of us grew up on comes out of two cans and a bag, and there is no shame in that — but it is also the single easiest dish on the table to make genuinely good, and it takes about fifteen more minutes than the canned version.
The whole thing turns on two steps. The green beans get blanched in salted water and shocked in ice before they ever see the oven, because beans do not get tender sitting in a cream sauce at 375°F — they just go gray. And the mushrooms get browned properly, left alone in a hot pan until the water cooks off and the edges catch, which is where all the savory depth comes from that a can of soup is trying to imitate.
From there it is a plain butter-and-flour sauce with broth, milk and a little cream. The OG does the seasoning — sea salt, organic garlic and organic black pepper, which is exactly the three things a mushroom cream sauce wants and nothing it does not.
It feeds eight to ten, it can be assembled two days ahead, and the crispy fried onions still go on at the very end. Some traditions are correct.
Green Bean Casserole with The OG
Green beans blanched and shocked, a real mushroom cream sauce built in the pan, and crispy fried onions on top at the very end. No canned soup. Serves eight to ten.
Ingredients
For the beans
- 2 lb fresh green beans, ends trimmed, snapped or cut into 2-inch pieces (or 2 lb frozen whole green beans, thawed and patted dry)
- 1 tablespoon kosher salt, for the blanching water
- A large bowl of ice water
For the mushroom cream sauce
- 4 tablespoons unsalted butter
- 1 lb cremini or white button mushrooms, stems trimmed, sliced ¼ inch thick
- 1 medium yellow onion, finely diced
- 4 cloves garlic, minced
- 2 teaspoons The OG seasoning, divided
- ¼ cup all-purpose flour
- 1½ cups low-sodium chicken or vegetable broth
- 1 cup whole milk
- ½ cup heavy cream
- 1 teaspoon Worcestershire sauce or soy sauce, for depth
- Freshly ground black pepper
For the top
- 1½ cups crispy fried onions
- ½ cup grated Parmesan (optional)
On the table
- Flaky salt
- Crushed red pepper
- Chopped flat-leaf parsley
Instructions
- Heat the oven to 375°F and butter a 9x13 baking dish. Bring a large pot of water to a hard boil with the tablespoon of kosher salt in it, and set a big bowl of ice water next to the stove.
- Blanch the beans. Drop them into the boiling water and cook 4 minutes, until they turn bright green and a bean bends without snapping. Lift them straight into the ice water and leave them there until they are cold. This is the step the whole dish turns on: green beans do not get tender sitting in a cream sauce at 375°F, they only go gray, so they have to go into the oven already cooked.
- Drain the beans and dry them hard, rolling them in a clean towel. Water clinging to the beans thins the sauce in the oven, and a thin sauce is what makes a casserole watery at the bottom of the dish.
- Brown the mushrooms. Melt the butter in a large skillet over medium-high heat, add the sliced mushrooms in as close to one layer as you can manage, and then leave them alone for 4 to 5 minutes. They will give up their water, the water will boil off, and only then will they start to brown. Stirring during that stretch is the single reason most mushroom sauces taste like nothing.
- Add the diced onion and cook 4 minutes, until soft and translucent. Add the garlic and 1 teaspoon of the seasoning and cook 45 seconds, just until the garlic smells like garlic. Dried garlic and pepper bloom in hot fat — put them in the liquid later and you lose most of what you paid for.
- Sprinkle the flour over everything and stir constantly for 2 minutes. It will look dry and pasty and that is correct. Two minutes is what cooks the raw flour taste out; skip it and the sauce tastes like library paste no matter what else you do.
- Pour in the broth slowly, whisking the whole time so no lumps form, then the milk, then the cream. Bring it to a simmer and cook 5 to 6 minutes, until it thickens enough to coat the back of a spoon. Stir in the Worcestershire, the remaining teaspoon of seasoning and a good grind of black pepper. Taste it now, while you can still fix it.
- Fold the dry beans into the sauce until every one is coated, then tip the whole thing into the buttered dish and spread it level.
- Bake 25 minutes uncovered, until the sauce is bubbling around the edges. Scatter the fried onions over the top — and the Parmesan, if you are using it — and put it back for 8 to 10 minutes, until the onions are deep golden. The onions go on late on purpose: thirty-five minutes in the oven turns them bitter and black.
- Let it sit 10 minutes before you carry it to the table. The sauce is loose straight out of the oven and sets up in that ten minutes into something that holds its shape on a spoon.
Why there is almost no salt in the ingredient list. Three salty things are already going in: the seasoning, which is built on sea salt, the fried onions, and the Parmesan if you use it. The tablespoon of kosher salt in the ingredient list is for the blanching water and almost none of it ends up in the dish. Season at step seven, taste there, and add more only if it needs it.
Make it ahead, because this is the dish to make ahead. Build it through step eight, cover the unbaked dish and refrigerate up to two days. Take it out while the oven heats, then bake it cold from the refrigerator and add 10 minutes to the first bake. The fried onions always go on at the end, never before it goes in the refrigerator — they go soft overnight and never come back.
Fresh, frozen, or canned — and what is actually in season. Mushrooms are at their best in the cool months and Carolina growers are at the markets with them now. Yellow onions and garlic came out of the fall harvest and keep all winter, and flat-leaf parsley is still going outside. Green beans are the honest exception: the Carolina crop is a summer bean plus a second fall planting that finishes with the first hard frost, so by late November fresh beans are coming from further south. Frozen whole green beans are a genuinely good answer in that case — thaw them, dry them, and skip the blanching. Canned green beans are not: they arrive already cooked past the point of no return and fall apart in the sauce.
Without the dairy, and without the flour. Unsweetened oat milk and a good olive oil in place of the butter and cream make a sauce that is thinner but still right, especially with the Parmesan left off. For a gluten-free table, thicken with 2 tablespoons of cornstarch slurried into the cold broth instead of the flour, add it at step seven rather than step six, and use gluten-free fried onions — the standard supermarket ones are made with wheat flour.
Leftovers. Reheat it covered in a 350°F oven for about 20 minutes rather than the microwave, which splits the sauce. Add a fresh handful of fried onions over the top for the last five minutes. Cold, chopped and fried in butter with an egg on it is also a defensible breakfast.
On the label. The OG is USDA Certified Organic, gluten free and kosher, with no MSG, no fillers and no anti-caking agents — sea salt, organic garlic and organic black pepper, and that is the whole ingredient list. We recommend the 5 oz resealable pouch over the jar: with nothing in it to keep it flowing, three real ingredients clump a little in humidity, and a pouch is easier to break up than a jar. The fried onions, the flour and the Parmesan are not ours, so read those labels yourself if gluten matters at your table. Free shipping over $25.
More of the table. This one sits next to The OG Mashed Potatoes, Southern Cornbread Dressing, Southern Collard Greens, Roasted Brussels Sprouts with Bacon and Candied Yams Sweet Potatoes, with Delightful Cranberry Sauce at the end of the row. For the middle of the table there is Anything With Wings Thanksgiving Turkey. And if you want The OG on something else this week, Crispy Smashed Potatoes runs on the same three ingredients.