Preheat Your Oven: Begin by preheating your oven to 350°F (175°C). This ensures your casserole bakes evenly and perfectly goldens the crispy onion topping. Prepare a 1 ½-quart casserole dish by lightly greasing it if desired, though often not strictly necessary with this recipe.
Combine the Creamy Base: In a large mixing bowl, combine the condensed cream of mushroom soup, milk, soy sauce (or Worcestershire sauce), and a small pinch of black pepper. Whisk these ingredients together until they are smooth and well-combined. The soy sauce is key here, adding that extra layer of savory depth to the sauce.
1 (10.75 ounce) can condensed cream of mushroom soup, ½ cup milk, 1 teaspoon soy sauce, Pinch black pepper
Add the Green Beans: Gently fold in the drained cut green beans into the creamy soup mixture. Ensure the green beans are thoroughly coated with the sauce. Be careful not to mash the beans; you want them to remain intact.
2 (14.5 ounce) cans cut green beans
Layer with Crispy Onions: Stir in about two-thirds (approximately 4 ounces) of the canned crispy fried onions into the green bean mixture. This incorporates that beloved crunch throughout the casserole, not just on top.
1 (6 ounce) can crispy fried onions
Transfer to Casserole Dish: Pour the entire green bean mixture into your prepared 1 ½-quart casserole dish. Spread it out evenly with a spoon or spatula to ensure consistent baking.
Bake Initial Stage: Place the casserole dish in your preheated oven and bake for 25 to 30 minutes. During this time, the casserole will heat through, and the flavors will meld beautifully. You'll notice the edges starting to bubble gently.
Add Final Crispy Topping: Remove the casserole from the oven. Sprinkle the remaining one-third (approximately 2 ounces) of crispy fried onions evenly over the top. This layer will become wonderfully golden and extra crunchy.
1 (6 ounce) can crispy fried onions
Final Bake: Return the casserole to the oven and bake for an additional 5 to 10 minutes, or until the topping is golden brown and the casserole is bubbly around the edges. Keep a close eye on it during this stage to prevent the onions from burning.
Serve and Enjoy: Carefully remove the piping hot Green Bean Casserole for Thanksgiving from the oven. Let it stand for a few minutes before serving. This allows the casserole to set slightly, making it easier to serve. Dive into this classic holiday favorite!
