Recipe Details

Green Bean Casserole

4 Stars
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Here at Delish, we believe our Thanksgiving dinner isn’t complete without green bean casserole. We have plenty of versions of this classic casserole, including a gluten-free version, a slow-cooker version, and even a vegan version.

Ingredients


  • Kosher salt

  • 2 lb. 

    green beans, trimmed

  • 12 tbsp. 

    (1 1/2 stick) unsalted butter, divided

  • 2 

    yellow onions, thinly sliced

  • 1 lb. 

    cremini mushrooms, sliced

  • Freshly ground black pepper

  • 4 

    cloves garlic, finely chopped

  • 1/2 c. 

    all-purpose flour

  • 6 c. 

    whole milk

  • 1 1/2 c. 

    French's fried onions

Description

  1. Step 1Preheat oven to 350°. Prepare an ice bath in a large bowl. In a large pot of generously salted boiling water, cook green beans until bright green, about 3 minutes. Using a slotted spoon or tongs, transfer beans to ice bath to cool. Drain and transfer to another large bowl.
  2. Step 2In another large pot or saucepan over medium heat, melt 4 tablespoons butter. Add onion and a large pinch of salt and cook, stirring occasionally, until starting to soften, about 7 minutes. Add mushrooms and cook, stirring often, until mushrooms are browned, about 7 minutes more. Add garlic and cook, stirring, until fragrant, about 1 minute. Season with salt and pepper, then transfer onion mixture to bowl with green beans.
  3. Step 3In same pot over medium heat, melt remaining 8 tablespoons butter. Add flour and cook, whisking frequently, until golden and smells toasty, about 3 minutes. Gradually whisk in milk; season with salt and pepper. Bring to a simmer and cook, stirring occasionally, until thickened, about 4 minutes. Add to bowl with green beans and stir to combine. Transfer to a 13" x 9" baking dish.
  4. Step 4Bake green bean casserole until warmed through and bubbling, about 30 minutes.
  5. Step 5Top with fried onions and continue to bake until warmed through, about 5 minutes more.