Healthy Green Bean Casserole

Healthy Green Bean Casserole

Healthy Green Bean Casserole made with fresh green beans, a lightened up cream sauce and caramelized red onions.
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 8 servings


  • 2 1/2 pounds green beans trimmed and cut into 1- to 2-inch pieces (about 8 cups)
  • 2 tablespoons olive oil divided
  • 1 tablespoon flour
  • 1 red onion thinly sliced
  • 4 ounces mushrooms minced very finely
  • 3/4 teaspoon Kosher salt
  • 1/4 teaspoon black pepper
  • 2 1/2 cups 2% milk
  • 1 cup 50% fat sharp cheddar cheese shredded


  1. Preheat the oven to 425 degrees.
  2. Toss the green beans with the olive oil and roast for 20-25 minutes.
  3. Lower the heat to 350 degrees.
  4. Add the second tablespoon of olive oil to the pan and cook the red onions until caramelized on medium high heat, about 5-7 minutes.
  5. Remove the onions and add in the mushrooms cooking them until they're caramelized, 5-7 minutes.
  6. Add in the flour, salt and pepper and half the red onions whisking well, cooking for 30 seconds.
  7. Add in the milk and whisk well, letting it cook for 3-4 minutes or until thick enough to coat a spoon.
  8. Toss the green beans with the sauce and cheese and place into a baking pan.
  9. Top with the remaining red green beans and bake for an additional 10 minutes, or until the cheese is melted and bubbly.