Begin by preheating your oven to 350°F (175°C).
In a medium bowl, whisk together Campbells Cream of Mushroom Soup, milk, and pepper. Mix until well combined.
1 can Campbells Cream of Mushroom Soup, 1/2 cup milk, 1/4 teaspoon black pepper
Gently stir in the drained green beans. Make sure the beans are evenly coated with the mushroom soup mixture.
2 cans green beans
Pour the green bean mixture into a 1 1/2-quart casserole dish.
Bake for 25 minutes, or until the casserole is hot and bubbly.
Sprinkle the French fried onions evenly over the top of the casserole.
1 1/3 cups French fried onions
Bake for an additional 5 minutes, or until the onions are golden brown and crispy.
Remove from the oven and let stand for a few minutes before serving.
Serve hot and enjoy the timeless taste of Campbells Green Bean Casserole!