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2.80 from 5 votes

Cheesy Mushroom and Onion Green Bean Casserole

This classic dish becomes a new family favorite that everyone at your Thanksgiving table will love. It will be a must every holiday.
Prep Time10 minutes
Cook Time30 minutes
Total Time40 minutes
Keyword: green beans, mushroom and onion green bean casserole
Servings: 12
Author: Kasey Schwartz


  • 2 cans 10.5 oz. each Campbell’s® Condensed Cream of Mushroom Soup
  • 1 cup milk
  • 1/2 tsp ground black pepper
  • 1/2 tsp salt
  • 4 cans 14.5 oz. each any style Del Monte® Green Beans, drained
  • 2 2/3 cups French’s® Crispy Fried Onions
  • 1 small sweet onion
  • 1 cup mushrooms
  • 1 tbsp butter
  • 1 tbsp olive oil
  • 1 1/4 cup shredded pepper jack cheese


  • Stir Campbell’s® soup, milk, salt, black pepper together in a bowl
  • Add the butter and olive oil to a sauté pan over medium heat. When hot, add the mushrooms and onions and cook until soft and golden. Remove from heat.
  • Add green beans, onions and mushrooms to bowl with soup mixture. Mix well.
  • Add in 1 cup of pepper jack cheese and stir well.
  • Place in 3 qt casserole dish, uncovered.
  • Bake at 350°F, uncovered, for 25 min. or until bean mixture is hot and bubbling. Stir bean mixture. Sprinkle with french fried onions and the remaining 1/4 cup cheese.
  • Bake for 5 min. or until onions are golden brown.