Original Green Bean Casserole 1 (10.75 ounce) can cream of mushroom soup 3/4 cup Milk 1/8 teaspoon Pepper 2 (9 ounce) packages frozen cut green beans, thawed 1 (2.8 ounce) can fried onions, divided Preheat oven to 350. In 1 1/2 quart casserole dish, combine soup, milk and pepper, stir until well blended. Stir in green beans and 2/3 cup onions. Bake for 30 minutes. Stir. Sprinkle with remaining onions. Bake for 5 minutes, or until onions are golden brown. Makes 6 servings.