This homemade green bean casserole combines tender green beans with a creamy mushroom sauce made from scratch using butter, garlic, broth, milk, and heavy cream. A layer of crispy fried onions and Parmesan adds a savory, crunchy finish without relying on canned cream of mushroom soup.
It is a comforting side dish for Thanksgiving, Christmas, or an everyday family dinner. The creamy filling can also be prepared ahead, making it easier to get this classic casserole on the table when you have other dishes to manage.
Why You’ll Love This Recipe
- Made from scratch: The creamy mushroom sauce uses simple ingredients instead of canned condensed soup.
- Fresh green beans: Blanching the beans first helps them retain their color and gives them a tender texture.
- Rich mushroom flavor: Golden mushrooms, garlic, thyme, and Worcestershire sauce build a savory base.
- Crispy onion topping: Fried onions add a crunchy contrast to the creamy filling.
- Make-ahead friendly: Prepare the filling in advance and finish baking it before serving.
Ingredients You’ll Need
- Fresh green beans: Two pounds of trimmed green beans form the base of the casserole. Cut them into 2-inch pieces so they are easy to serve and cook evenly.
- Butter: Unsalted butter helps brown the mushrooms and gives the sauce a rich base.
- Cremini or button mushrooms: These add an earthy, savory flavor. Both varieties work well in the homemade sauce.
- Garlic: Minced garlic adds aroma and depth to the mushroom mixture.
- All-purpose flour: Flour thickens the sauce and helps it cling to the green beans.
Chef’s Tip: Cook the mushrooms until their released moisture has evaporated and they begin to turn golden. This step concentrates their flavor and helps prevent excess liquid from thinning the homemade sauce.
Homemade Green Bean Casserole Recipe
This homemade green bean casserole features tender green beans coated in a creamy mushroom sauce and topped with crispy fried onions. The sauce is made from scratch with mushrooms, garlic, butter, and milk, giving the casserole a rich, savory flavor without relying on canned cream soup.It is a comforting side dish that fits beautifully into Thanksgiving dinners, Christmas meals, and everyday family gatherings. Prepare the creamy filling ahead of time, add the crunchy topping, and bake until hot and golden for a satisfying dish everyone can enjoy.
Equipment
- Large saucepan
- Large skillet
- Colander
- Whisk
- Wooden spoon or spatula
- Sharp knife
- Cutting board
- 9 × 13-inch baking dish
Ingredients
- 2 pounds fresh green beans trimmed and cut into 2-inch pieces
- 2 tablespoons unsalted butter
- 8 ounces cremini or button mushrooms sliced
- 2 cloves garlic minced
- 3 tablespoons all-purpose flour
- 1 cup chicken or vegetable broth
- 1 cup whole milk
- ½ cup heavy cream
- 1 teaspoon Worcestershire sauce
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon dried thyme
- 1½ cups crispy fried onions divided
- ½ cup grated Parmesan cheese
Instructions
- Prepare the Green Beans: Preheat the oven to 375°F (190°C). Bring a large pot of salted water to a boil. Add the trimmed green beans and cook for 4–5 minutes, until bright green and slightly tender. Drain and transfer them to a bowl of ice water to stop the cooking. Drain again and set aside.
- Cook the Mushrooms: Melt the butter in a large skillet over medium heat. Add the sliced mushrooms and cook for 6–8 minutes, stirring occasionally, until they release their moisture and turn golden. Stir in the minced garlic and cook for another 30 seconds.
- Make the Creamy Sauce: Sprinkle the flour over the mushrooms and stir for about 1 minute. Gradually whisk in the broth, followed by the milk and heavy cream. Continue stirring until the mixture becomes smooth and begins to thicken.
- Season the Sauce: Add the Worcestershire sauce, salt, black pepper, and dried thyme. Simmer gently for 3–5 minutes, stirring frequently, until the sauce is thick enough to coat the back of a spoon.
- Combine the Ingredients: Add the blanched green beans to the skillet and stir until they are evenly coated in the mushroom sauce. Fold in ½ cup of the crispy fried onions and half of the Parmesan cheese.
- Transfer to the Baking Dish: Lightly grease a 9 × 13-inch baking dish. Spoon the green bean mixture into the dish and spread it into an even layer. Sprinkle the remaining Parmesan cheese over the top.
- Bake the Casserole: Place the dish in the preheated oven and bake uncovered for 20 minutes, until the sauce is bubbling around the edges and the green beans are tender.
- Add the Crispy Topping: Remove the casserole from the oven and scatter the remaining crispy fried onions evenly over the surface. Return it to the oven for another 5–7 minutes, until the onions are golden and crisp. Let it rest for 5 minutes before serving.
Notes
- Avoid overcooking the green beans during blanching because they will continue cooking in the oven.
- Cook the mushrooms until their moisture evaporates to keep the sauce from becoming watery.
- Add the broth gradually while whisking to prevent lumps from forming.
- For a vegetarian version, use vegetable broth instead of chicken broth.
- The casserole filling can be prepared up to one day ahead. Refrigerate it without the crispy onion topping, then bake until hot and add the onions near the end.
Nutrition Information
| Nutrient | Amount |
|---|---|
| Calories | 210 kcal |
| Carbohydrates | 22 g |
| Protein | 8 g |
| Fat | 11 g |
| Fiber | 5 g |
| Sugar | 6 g |
| Sodium | 590 mg |
Easy Variations to Try
- Use different mushrooms: Try a combination of cremini, button, and shiitake mushrooms for a deeper mushroom flavor.
- Add caramelized onions: Stir a small amount of caramelized onion into the mushroom sauce for extra sweetness.
- Include crispy bacon: Add cooked, crumbled bacon to the filling for a smoky, savory variation.
- Make it extra cheesy: Stir a little shredded sharp cheddar into the sauce before combining it with the green beans.
- Add a crunchy nut topping: Sprinkle chopped toasted almonds over the fried onions just before serving.
What to Serve with Green Bean Casserole
- Apple Cinnamon Oatmeal Recipe
- Cottage Cheese Flatbread Recipe
- Keto Pita Bread Recipe
- Sticky Sesame Chickpeas Broccoli Recipe
- Quick Caramelized Onions Recipe
Frequently Asked Questions
- Can I make green bean casserole without canned cream of mushroom soup?Yes. This recipe makes its own creamy mushroom sauce with fresh mushrooms, butter, flour, broth, milk, and heavy cream.
- Can I use canned green beans instead of fresh?
Yes, but drain them very well before adding them to the sauce. Canned green beans are already cooked, so they will have a softer texture and need less cooking than fresh beans. - Do I need to blanch fresh green beans first?
Yes, blanching helps soften the beans slightly and preserves their bright green color. - What mushrooms work best in homemade green bean casserole?
Cremini and button mushrooms are both good choices. Cremini mushrooms have a slightly deeper, earthier flavor, while button mushrooms are milder. - Can I make this casserole vegetarian?
Yes. Use vegetable broth instead of chicken broth and choose a vegetarian Worcestershire sauce. Also check that the Parmesan cheese you use is suitable for a vegetarian diet. - Why is my homemade mushroom sauce not thickening?
It may need a few more minutes of gentle simmering. Stir frequently and allow the flour to cook with the liquid until the sauce coats the back of a spoon. - Can I use a different baking dish?
Yes. A similarly sized oven-safe casserole dish will work. If you use a deeper or smaller dish, the filling may take longer to heat through, so check that it is bubbling before adding the final onion topping.
