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The Ultimate Green Bean Casserole with Potatoes

The Ultimate Green Bean Casserole with Potatoes: 50-Minute Comfort Classic for Every Table.


  • Author: Ryder Jameson
  • Total Time: 50 minutes
  • Yield: 6 servings 1x
  • Diet: Vegetarian

Description

The Ultimate Green Bean Casserole with Potatoes is a gluten-free, creamy, and crispy side that shines on any table. Tender potatoes meet crisp green beans, mushrooms, and a velvety milk-based sauce, topped with cheddar and crunchy fried onions. Oven-baked to a golden crust, this comforting, crowd-pleasing dish pairs beautifully with roast meats or a hearty vegetarian main, with adaptable dairy-free options for wider enjoyment.


Ingredients

Scale
  • 3 cups fresh green beans, trimmed and cut in half
  • 3 medium potatoes, peeled and diced
  • 1 small onion, finely chopped
  • 2 cloves garlic, minced
  • 1 cup sliced mushrooms (optional)
  • 1 1/2 cups milk (or dairy-free alternative)
  • 2 tbsp cornstarch mixed with 2 tbsp water
  • 1 cup shredded cheddar cheese (or dairy-free cheese)
  • 1 tsp salt
  • 1/2 tsp black pepper
  • 1 tsp paprika
  • 1 cup crispy fried onions (gluten-free if needed)
  • 2 tbsp olive oil

Instructions

  1. Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
  2. Boil the diced potatoes in salted water for 8–10 minutes until tender but not mushy. Drain and set aside.
  3. Steam or blanch the green beans for 5 minutes, then rinse under cold water to keep them crisp and green.
  4. In a large skillet, heat olive oil over medium heat. Add onions, garlic, and mushrooms (if using). Sauté until softened.
  5. Add milk, salt, pepper, and paprika. Slowly stir in the cornstarch mixture and cook until thickened into a creamy sauce.
  6. Stir in the cooked potatoes, green beans, and half of the cheese. Mix well.
  7. Transfer to the prepared baking dish, sprinkle remaining cheese on top, and bake for 20 minutes.
  8. Remove from oven, top with crispy fried onions, and bake for an additional 5–7 minutes until golden brown.
  9. Let it rest for 5 minutes before serving.

Notes

  • Heavy cream can be substituted for milk for added richness; thin with a splash of water if needed.
  • Fresh green beans give the best texture, but canned beans can be used—drain well and adjust cooking time accordingly.
  • To keep the dish gluten-free, use gluten-free fried onions.
  • For a dairy-free version, use dairy-free milk and cheese.
  • Allow the casserole to rest about 5 minutes before serving for cleaner slices.
  • Prep Time: 20 minutes
  • Cook Time: 30 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1/6 of casserole
  • Calories: 410
  • Sugar: 7 g
  • Sodium: 550 mg
  • Fat: 23 g
  • Saturated Fat: 9 g
  • Unsaturated Fat: 12 g
  • Trans Fat: 0 g
  • Carbohydrates: 40 g
  • Fiber: 7 g
  • Protein: 16 g
  • Cholesterol: 70 mg

Keywords: green bean casserole, potatoes, creamy side dish, gluten-free, dairy-free option, oven baked, crowd-pleaser, family dinner, mushroom, fried onions