Though it is a bit more labor intensive, it is totally worth it! This recipe serves 6 to 8 people, and will take you about 45 minutes. You’ll need 10 of those minutes for preparation, and 30 minutes of cook time. If you haven’t trimmed your green beans, you’ll need to add some extra prep time for snapping the beans. We prepared this part the night before, then fried the shallots and baked it the morning of.
See how green the beans are? We blanched them, so they kept a lot of their color. We weren’t able to find creminis, so we used shitake, bella, and oyster. We doubled this recipe and it came out well. We just used two separate 9×13 pans.
Green bean casserole is a staple Thanksgiving side dish, and while many families love the Campbell's Cream of Mushroom Soup and French's Fried Onions version, this one is even better!
- Green Beans - 1 1/2 pounds, trimmed
- Kosher Salt - As needed, to taste
- Ground Black Pepper - As needed, to taste
- Unsalted Butter - 2 tablespoons
- Vegetable Oil - 1 tablespoon, plus more for frying
- MIxed Gourmet Mushrooms - 1 pound, cleaned and quartered
- Fresh Thyme - 1/2 teaspoon
- Garlic Cloves - 2, minced
- Cayenne Powder - 1/4 teaspoon
- Fresh Ground Nutmeg - 1/4 teaspoon
- All Purpose Flour - 2 tablespoons, plus 1 cup for dredging shallots
- Low Sodium Chicken Broth - 1 cup
- Sour Cream - 1 cup
- Heavy Cream - 1/2 cup
- Grated Paremesan - 1/4 cup
- Shallots - 4, medium, sliced into thin rounds and separated
Preheat the oven to 450 degrees F.
Bring a large pot of salted water to a boil. Add the green beans and cook until they just turn bright green, 2 to 3 minutes. (You don't want to cook the green beans through as they will cook in the oven also.) Strain and plunge the green beans immediately in a large bowl of ice water to stop the cooking process. When cool, drain and set out to dry on paper towels.
Set a 12-inch cast-iron skillet over medium-high heat. Add the butter and vegetable oil. Once the butter is melted and the pan is hot, add the mushrooms. Cook undisturbed so the mushrooms sear nicely, about 1 minute. Add the thyme and garlic and continue cooking the mushrooms to achieve some nice color. Season with the salt, pepper, cayenne and nutmeg. Cook 2 to 3 more minutes longer, dusting the mushrooms with some of the flour as they release moisture. Stir with a whisk to incorporate the flour (just like making a roux) and gradually add in the chicken stock. Bring to a simmer, then reduce the heat and add the sour cream and cream. Stir gently and cook over low heat until gravy thickens, 5 to 6 minutes. Add the blanched green beans to the pan and fold together so everything is mixed well. Spread out evenly in the pan. Sprinkle the green beans with the grated Parmesan and transfer to a roasting tray (to catch any spill-over). Bake until the casserole is bubbly and the top is melted and golden, 15 minutes.
Pour the vegetable oil into a deep skillet and heat to 350 degrees F. Pour the flour into a large mixing bowl and sprinkle generously with salt and pepper. Toss the shallot rounds in the seasoned flour, then place in a strainer and shake off any excess flour. Fry the shallots in the hot oil in small batches until golden brown, 3 to 5 minutes. Drain on paper towels and season with salt while still hot.
Top the green bean casserole with the fried shallots and serve.