Nothing beats a homemade green bean casserole at Thanksgiving. This Smoked Green Bean Casserole brings a smoky, savory twist to the holiday classic. Cooked in a 12-inch cast iron skillet and finished with crisp homemade onion strings, this version is worth making from scratch.
Green Bean Casserole on the Smoker
Green bean casserole is a Thanksgiving staple, but the typical canned-soup version can be easily upgraded. Making the dish from scratch brings brighter flavors, better texture, and a homemade touch that guests will notice. Smoking the casserole adds a gentle barbecue aroma that complements the creamy mushroom sauce and crunchy onion topping.
This smoked version retains the comforting foundation of the classic—blanched green beans and a creamy mushroom sauce—while adding a smoky note from the smoker. If you prefer, the casserole can be baked in the oven with the same temperature and timing described below. Either way, the homemade onion strings make a major difference in texture and flavor.
How to Make This Green Bean Casserole
This recipe is made in three parts: prepare the crunchy onion strings, make the creamy green bean mixture, and finish by smoking (or baking) the assembled casserole. You can prepare components a day or two ahead—make the onion strings and the green bean mixture in advance, refrigerate, then assemble and smoke just before serving.
- Crunchy onion strings: Thinly sliced onions are coated in egg, dredged in a seasoned flour and panko mixture, and baked until golden and crisp. These replace store-bought fried onions and offer superior crunch and flavor.
- Green bean casserole base: Blanch the green beans to preserve color and texture, sauté cremini mushrooms with butter and garlic, then thicken with flour before adding chicken broth and half-and-half for a rich, creamy sauce.
- Finish in the smoker or oven: Assemble the casserole in a cast iron skillet, top with the onion strings, and smoke at 275°F for about 30 minutes. If you don’t have a smoker, bake at 275°F in the oven for approximately the same time.
Can You Cook This in the Oven?
Yes. If you don’t have a smoker, this casserole works beautifully in the oven. Preheat the oven to 275°F and bake the assembled casserole for about 30 minutes, the same timing recommended for the smoker. Baking will still give you a creamy interior and warm, crisp onions on top.
More Green Bean Ideas
If you enjoy green beans prepared with bold flavors and smoky accents, consider trying other green bean recipes that pair well with holiday menus or backyard cookouts. Variations like bacon-wrapped beans or garlic-parmesan grilled green beans offer different textures and tastes while keeping green beans a standout side dish.
Other Classic Thanksgiving Sides
Pair this smoked green bean casserole with other classic sides to complete a memorable Thanksgiving plate: smoked mashed potatoes, candied sweet potato stacks, or smoked sausage stuffing all complement the flavors and textures of this casserole.
Smoked Green Bean Casserole – Recipe
Ingredients
Crunchy Onion Strings
- 1 medium yellow onion, thinly sliced
- 2 eggs, lightly beaten
- 1/4 cup all-purpose flour
- 1 tablespoon panko bread crumbs
- 1 teaspoon kosher salt
Green Bean Casserole
- 2 tablespoons plus 1 teaspoon kosher salt, divided use
- 1 pound green beans, ends trimmed
- 2 tablespoons salted butter
- 12 ounces cremini mushrooms, stems trimmed and caps thinly sliced
- 1/2 teaspoon cracked black pepper
- 2 cloves garlic, minced
- 2 tablespoons all-purpose flour
- 1 cup chicken broth
- 1 cup half-and-half
Instructions
- Preheat: Preheat the oven to 400°F. Also preheat your smoker to 275°F using a mild hardwood such as pecan, apple, hickory, or alder if smoking.
- Boil water: Fill a large pot with water, stir in 1 tablespoon of salt, and bring to a boil.
- Prepare the onion strings: Place the sliced onions in a large zip-top bag and add the beaten eggs, tossing to coat. In a small bowl, combine the 1/4 cup flour, panko, and 1 teaspoon salt. Spread the coating mixture in a shallow pan and toss the egg-coated onions in the mixture until evenly coated.
- Bake the onions: Line a baking sheet with foil and coat with nonstick spray. Spread the coated onions in a single layer and bake at 400°F, stirring gently every 5 minutes, until golden brown, about 20 minutes total. Remove and let cool.
- Blanch the green beans: Place trimmed green beans in the boiling salted water for 5 minutes. Drain and immediately transfer to an ice bath to stop the cooking and retain color.
- Sauté the mushrooms: Melt butter in a 12-inch cast iron skillet over medium-high heat. Add sliced mushrooms, 1 teaspoon salt, and black pepper. Cook, stirring frequently, until the mushrooms begin to brown and soften, about 4–5 minutes. Add garlic and cook for 1 minute more.
- Build the sauce: Sprinkle the remaining 2 teaspoons of flour into the skillet and stir to incorporate. Cook for about 2 minutes to remove the raw flour taste. Stir in chicken broth, scraping up any browned bits from the pan. After a minute, add the half-and-half and bring to a gentle boil. Reduce heat to medium-low and simmer until thick and creamy, about 5 minutes.
- Assemble: Turn off the heat and gently fold the blanched green beans into the creamy mushroom sauce. Top the mixture evenly with the cooled crunchy onion strings.
- Smoke or bake: If using a smoker, place the skillet on the grill grates and smoke at 275°F for 30 minutes. If using an oven, bake at 275°F for approximately 30 minutes.
- Serve: Remove from heat and serve immediately while hot for the best texture and flavor.
Notes
Make the onion strings and green bean mixture up to two days ahead and refrigerate. Assemble and smoke or bake just before serving for best results. The recipe serves about 6 people and works well alongside traditional Thanksgiving sides.
This recipe combines the familiarity of a classic green bean casserole with a smoky depth that elevates the dish. The crispy homemade onion strings and the creamy mushroom sauce are key to achieving a satisfying contrast in every bite. Whether you smoke it or bake it, this homemade green bean casserole is a standout side for holiday meals and special gatherings.