Classic Green Bean Casserole

Recipe Photo
8 tablespoons unsalted butter, divided
2 pounds fresh green beans, trimmed and halved
2 cups sliced fresh baby portobello mushrooms
1 cup thinly sliced yellow onion
4 cloves garlic, minced
1 tablespoon apple cider vinegar
¼ cup all-purpose flour
2 cups heavy whipping cream
½ cup grated Parmesan cheese
2 tablespoons chopped fresh thyme
1 tablespoon Worcestershire sauce
1½ teaspoons kosher salt
¾ teaspoons ground black pepper
Fried Onion Topping (recipe follows)
Garnish: fresh thyme leaves
Go To Recipe