This easy Green Bean Casserole comes together in 10 minutes! Whether you use fresh, frozen, or canned green beans, its creamy mushroom base and crispy topping make it perfect for any festive occasion.
In a large skillet, heat 1 tablespoon of olive oil over medium heat. Sauté the chopped onion until soft and translucent, about 3-4 minutes. Stir in the minced garlic and cook for 1 minute until fragrant. Add the sliced mushrooms and cook until they release their moisture and become tender, about 5-6 minutes. Season with salt and pepper. Set the mixture aside.
Blanch the Green Beans. Bring a large pot of water to a boil and add the green beans. Boil for 4-5 minutes until they turn bright green and are just tender. Drain immediately and plunge the beans into a bowl of ice water to stop the cooking process and keep them crisp. Drain again to remove excess water.
Grease a 9x13-inch baking dish. Spread the cooked mushroom mixture evenly across the bottom of the dish. Layer the green beans on top of the mushroom mixture. Pour the mushroom soup over the green beans and mix gently to coat everything evenly.
Sprinkle the fried onions evenly across the top of the casserole, followed by the shredded cheddar cheese.
Bake for 20-25 minutes, or until the casserole is bubbly and the cheese is melted and golden brown.
Remove the casserole from the oven and let it cool for about 5 minutes before serving. This will allow the flavors to settle and the sauce to thicken slightly. Enjoy this delicious side dish with your favorite meal!
Notes
Fresh or frozen green beans should be boiled just until tender-crisp to maintain texture.
Canned green beans should be drained and do not need to be boiled.