Classic Green Bean Casserole

Classic Green Bean Casserole

Prep Time Prep: 10m Cook Time Cook: PT0S Total Time Total: 55m

Yield: 6

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Thanksgiving, side dish

  • 1 lb. green beans, trimmed
  • 6 tbsp. butter, divided
  • 1 onion, sliced into half moons
  • 8 oz. sliced mushrooms
  • Kosher salt
  • Freshly ground black pepper
  • 2 cloves garlic, minced
  • 1/4 c. flour
  • 3 c. whole milk
  • 1 1/2 c. French's fried onions
  1. Preheat oven to 350°. Prepare an ice bath: In a large pot of boiling water, add green beans and cook until bright green, about 6 minutes. With a slotted spoon or tongs, quickly transfer green beans to ice bath to cool, then drain and transfer to a large bowl. In a large ovenproof skillet over medium heat, melt 2 tablespoons butter. Add onion and cook, stirring occasionally, until tender, about 5 minutes. Add mushrooms and season with salt and pepper. Cook, stirring often, until mushrooms are golden, about 5 minutes more. Stir in garlic and cook until fragrant, 1 minute, then transfer mixture to green bean bowl. In same skillet over medium heat, melt remaining 4 tablespoons butter. Whisk in flour and cook until golden, about 2 minutes. Gradually whisk in milk and season with salt and pepper. Bring to a simmer and cook until thickened, about 4 minutes. Remove from heat, then add green bean mixture and toss until even combined. Bake until warmed through and bubbling, about 30 minutes. Top with fried onions and bake 5 minutes more. 

Ingredients

  • 1 lb. green beans, trimmed
  • 6 tbsp. butter, divided
  • 1 onion, sliced into half moons
  • 8 oz. sliced mushrooms
  • Kosher salt
  • Freshly ground black pepper
  • 2 cloves garlic, minced
  • 1/4 c. flour
  • 3 c. whole milk
  • 1 1/2 c. French's fried onions

Instructions

  1. Preheat oven to 350°. Prepare an ice bath: In a large pot of boiling water, add green beans and cook until bright green, about 6 minutes. With a slotted spoon or tongs, quickly transfer green beans to ice bath to cool, then drain and transfer to a large bowl. In a large ovenproof skillet over medium heat, melt 2 tablespoons butter. Add onion and cook, stirring occasionally, until tender, about 5 minutes. Add mushrooms and season with salt and pepper. Cook, stirring often, until mushrooms are golden, about 5 minutes more. Stir in garlic and cook until fragrant, 1 minute, then transfer mixture to green bean bowl. In same skillet over medium heat, melt remaining 4 tablespoons butter. Whisk in flour and cook until golden, about 2 minutes. Gradually whisk in milk and season with salt and pepper. Bring to a simmer and cook until thickened, about 4 minutes. Remove from heat, then add green bean mixture and toss until even combined. Bake until warmed through and bubbling, about 30 minutes. Top with fried onions and bake 5 minutes more.