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a circular baking dish with crispy onions on top a traditional green bean caserole

Grandma's Green Bean Casserole

  • Author: Melissa Griffiths - Bless this Mess
  • Total Time: 45 minutes
  • Yield: Serves 8


Green bean casserole is a savory holiday side dish with all kinds of big and delicious flavors, and it's totally easy to make day of or ahead of time!


  • 3 cans green beans (14.5 ounce)
  • 3 tablespoons butter
  • 1/3 cup white onion, finely chopped
  • 1 clove garlic, minced
  • 3 tablespoons all-purpose flour
  • 1 teaspoon salt
  • 1/2 cup milk
  • 1/2 cup sour cream
  • 1 cup cracker crumbs (we like to use butter round crackers)
  • 1 tablespoon melted butter


  1. Preheat the oven to 350 degrees F.
  2. Drain and rinse the canned green beans, and set aside.
  3. In a medium saucepan, melt the butter. When it is melted, add the onion and garlic, and stir to combine. Cook for 1 minute.
  4. Add the flour, and cook for another minute, stirring often.
  5. Whisk in salt and then the milk, and cook for one more minute until the mixture thickens.
  6. Remove from the heat, and stir in the sour cream.
  7. Add the rinsed green beans to the pan, and gently stir to combine.
  8. Place the green bean mixture in the bottom of the 2.5-quart baking dish (this can be a 9-inch square, a 9-inch round, or other similar-sized oval dishes).
  9. Add the cracker crumbs and melted butter to a small bowl, and stir to combine.
  10. Sprinkle the cracker crumbs over the green bean mixture.
  11. Bake for 30 minutes or until the mixture is hot and the cracker crumbs are golden-brown.
  12. Serve hot.
  • Prep Time: 15 min
  • Cook Time: 30 min
  • Category: side
  • Method: bake
  • Cuisine: American

Keywords: green bean casserole, green bean casserole without canned soup