Need a fresh side for your holiday table? This updated take on the classic green bean casserole is lighter, brighter, and full of flavor. Green Beans with Cremini Mushroom Sauce is an elegant, delicious alternative that highlights fresh beans and mushrooms with a lightly creamy sauce and a crisp shallot topping.
This version is adapted from a recipe by Marcia Kiesel, originally published in Food & Wine. The sauce here is restrained and flavorful rather than heavy, the vegetables stay vibrant, and the crunchy fried shallots—made from thinly sliced shallots—add the perfect finishing touch.
The ingredient list may look long, but every item adds value
- Shallots – thinly sliced; the thinner they are, the crisper they fry.
- All-purpose flour – regular or gluten-free, used for the shallot coating and sauce thickening.
- Vegetable oil – for frying the shallots; neutral oil or light olive oil works well.
- Kosher salt – coarse salt is great for seasoning the fried shallots.
- Fresh green beans – trimmed and parboiled until just tender.
- Unsalted butter – for cooking the onions and mushrooms.
- Onion – thin vertical slices to soften into the sauce.
- Spices – paprika, freshly ground black pepper, and an optional pinch of cayenne.
- Cremini mushrooms – caps thinly sliced (baby portabellas), stems discarded.
- Vegetable broth or stock – chicken stock may be used if preferred.
- Crème fraîche – a small amount to add light creaminess without weighing the dish down.
- Fresh lemon juice – brightens and cuts through the richness.
Make the crispy shallots ahead
- The fried shallots can be prepared in advance and stored airtight; reheat briefly in a 350°F oven to refresh their crispness.
- Make extra — they’re wonderful on mashed potatoes or as a crunchy garnish for other dishes.
Key steps for great results
- Toss the sliced shallots in 1/4 cup flour on a rimmed baking sheet and shake off excess flour.
- Heat about an inch of oil in a large deep skillet until shimmering and fry the shallots in two batches until very crisp, about 2–3 minutes per batch. Drain on paper towels and sprinkle with salt.
- In a large pot of boiling salted water, cook the beans until just tender, about 5 minutes. Refresh under cold running water, then drain and pat dry.
Be careful not to overcook the green beans when boiling; they should be parboiled so they remain firm after baking.
- Melt butter in a heavy skillet, add the sliced onion and cook over low heat until softened, about 5 minutes.
- Add paprika, optional cayenne, and black pepper; cook for 1 minute.
- Add the mushrooms, cover and cook over moderate heat until softened, about 5 minutes. Uncover and continue cooking until browned, another 4–5 minutes.
- Stir in the remaining 1 1/2 tablespoons flour, then gradually whisk in the stock until the sauce is smooth.
- Preheat the oven to 400°F.
- Simmer the mushroom sauce over low heat until it thickens, about 3–5 minutes. Stir in the crème fraîche, lemon juice, and the drained green beans.
- Cover and simmer briefly until the beans are heated through, about 5 minutes. Season to taste with salt and pepper.
- Transfer to a large ovenproof dish (or leave in an ovenproof skillet), cover with foil, and bake until bubbling, about 20 minutes.
- Uncover, scatter the crispy shallots on top, and serve.
Green Beans With Cremini Mushroom Sauce
Adapted from Food & Wine. A perfect vegetable side for roast turkey, chicken, beef, or pork.
Servings
Serves 4 (comfortable for 4–6 as a side; double for larger gatherings)
Ingredients
- 8 ounces shallots, thinly sliced
- 1/4 cup all-purpose flour, plus 1 1/2 tablespoons more
- Vegetable oil, for frying
- Coarse kosher salt, for seasoning
- 20 ounces fresh green beans, trimmed
- 1 tablespoon unsalted butter
- 1 small onion (about 4 ounces), thinly sliced vertically
- 1/4 teaspoon paprika
- Pinch cayenne pepper (optional)
- Freshly ground black pepper
- 8 ounces cremini mushrooms, stems discarded and caps thinly sliced
- 1 cup vegetable broth or stock (or chicken stock)
- 1/4 cup crème fraîche
- 1 tablespoon freshly squeezed lemon juice
Instructions
- Toss the shallots with 1/4 cup of flour on a rimmed baking sheet and shake off the excess. Heat 1 inch of oil in a large, deep skillet until shimmering. Fry the shallots in two batches over moderate heat until very crisp, about 2–3 minutes per batch. Drain on paper towels and sprinkle with salt.
- Cook the green beans in a large pot of boiling salted water until just tender, about 5 minutes. Drain, refresh under cold running water, then drain and pat dry.
- Melt the butter in a large heavy skillet. Add the onion and cook over low heat until softened, about 5 minutes. Add paprika, cayenne if using, and a pinch of black pepper; cook for 1 minute. Add the mushrooms, cover and cook until softened, about 5 minutes. Uncover and cook, stirring, until browned, another 4–5 minutes. Stir in the remaining 1 1/2 tablespoons of flour, then gradually stir in the stock until smooth.
- Preheat the oven to 400°F. Simmer the mushroom sauce over low heat until thickened, about 3–5 minutes. Stir in the crème fraîche, lemon juice, and the green beans. Cover and simmer until heated through, about 5 minutes. Season with salt and pepper.
- Transfer to a large ovenproof dish or keep in an ovenproof skillet, cover with foil, and bake until bubbling, about 20 minutes. Uncover, sprinkle the crispy shallots on top, and serve.
Make-Ahead Tips
The assembled casserole (without the fried shallot topping) can be refrigerated overnight; bring to room temperature before baking. Fried shallots can be stored in an airtight container and refreshed in a 350°F oven to recrisp.
Why this works
- The mushroom sauce is light and flavorful, just enough to coat each bean and mushroom slice without becoming heavy.
- Crispy fried shallots add texture and a savory crunch that elevates the dish into a show-stopping side.
- Suitable for vegetarian and gluten-free guests when you choose gluten-free flour and vegetable stock.
More delicious sides
Try this alongside roasted carrots with a honey-butter glaze, a cheesy baked pasta, or a mushroom-and-leek bread pudding for a complete holiday spread.
