Green Bean Casserole

INGREDIENTS

  • 1 lb. green beans, trimmed
  • 6 tbsp. butter, divided
  • 1 onion, sliced into half moons
  • Kosher salt
  • Freshly ground black pepper
  • 2 cloves garlic, minced
  • 1/4 c. all-purpose 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.
  2. In a large ovenproof skillet over medium heat, melt 2 tablespoons butter. Add onion and cook, stirring occasionally, until tender, about 5 minutes. Season with salt and pepper. Cook, stirring often, about 5 minutes more. Stir in garlic and cook until fragrant, 1 minute, then transfer mixture to green bean bowl.
  3. 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.
  4. Bake until warmed through and bubbling, about 30 minutes.
  5. Top with fried onions and bake 5 minutes more.