This easy green bean casserole uses fresh green beans, sautéed mushrooms, sweet onions, and Campbell’s cream of mushroom soup for the perfect balance of classic flavor and fresh, lighter texture. Finished with a golden Parmesan-panko topping, it’s the holiday side that feels upgraded without being complicated.
Prep Time5 minutesmins
Cook Time20 minutesmins
Total Time25 minutesmins
Course: Side Dish
Cuisine: American
Keyword: easy green bean casserole, green bean casserole
In a small mixing bowl, combine the panko, 1/4 cup parmesan cheese, and 2 tbsps of olive oil. Set aside.
1 cup panko breadcrumbs, 1/2 cup freshly grated Parmesan cheese dided, 4 tablespoons olive oil divided
Blanch the green beans: Bring a very large pot of water to a boil. Prepare an ice water bath and set out a large, clean kitchen towel. Place the green beans in the water and cook just until crisp-tender, about 3 minutes. Then transfer them into an ice bath to stop the cooking. Lightly pat the green beans dry.
2 pounds fresh green beans
Meanwhile, heat 1 tbsp of olive oil in a large skillet over medium heat. Add the mushrooms and cook until they release their juices (you can speed this up by covering them for a few minutes), then add the onion. Continue cooking, stirring frequently, for 10-15 minutes, or until the onion is soft and golden and the mushrooms have started to brown.
1 pound cremini mushrooms, 1 yellow onion
Add the garlic, thyme, salt, and pepper, and cook for 1 more minute.
Stir in the cream of mushroom soup and chicken broth. Mix until smooth and simmer for 3-4 minutes. Then stir in 1/4 cup parmesan. You can add a splash more broth if the mixture is too thick.
10.5 ounces Cream of Mushroom Soup, 1/2 cup chicken broth
Grease a 9x9 baking dish with the remaining 1 tbsp of olive oil. Add half the green beans to the baking dish and spread half the sauce over top. Add the remaining green beans and top with the remaining sauce. Sprinkle the panko mixture over top.
Place the green bean casserole in the oven under the broiler and cook for 1-3 minutes, until the casserole is bubbling and the panko starts to brown.
Garnish with more thyme or fresh parsley before serving.
Notes
Make ahead instructions:
Assemble the casserole but don’t add the topping.
Refrigerate tightly covered for up to 48 hours.
Before baking: let the casserole sit at room temperature for 30–45 minutes so it isn’t ice-cold.
Add the panko-Parmesan topping.
Bake covered at 350°F for 15-20 minutes until hot and bubbling, then uncover and broil 1–2 minutes at the end for the golden crust.