Green Bean Casserole

Ingredients

• 454 g (1 lb)green beans, left whole
• 1.42 litres (6 cups)water
• 340 g (12 oz)white button mushrooms, sliced
• ¼ mediumonion, finely diced
• 3 clovesgarlic, minced
• 1.25 ml (¼ tsp)Tuscan seasoning
• 30 ml (2 tbsp)olive oil
• 2 tbspflour
• 180 ml (¾ cup)chicken or vegetable stock
• 180 ml (¾ cup)double cream
• A pinchground nutmeg
• To tastesalt
• To tastepepper
• 120 ml (½ cup)seasoned panko breadcrumbs
• 170 g (6 oz)crispy fried onions

Instructions

1. 1

   Boil the water

   Bring the water and a generous pinch of kosher salt to the boil in a heavy stock pot over medium heat.

2. 2

   Blanch the beans

   Rinse the green beans, add them to the boiling water and cover. Cook for 4–5 minutes, or 3–4 minutes if using French green beans. Transfer them straight into a bowl of ice water to stop the cooking, then move them to a paper-towel-lined tray to drain. Discard the cooking water and return the pot to the hob.

3. 3

   Soften the aromatics

   Over medium heat, add the olive oil and diced onion to the pot. Toss to coat and let the onion soften for about 1 minute. Add the garlic and cook for about 1 minute, until fragrant.

4. 4

   Cook the mushrooms

   Add the mushrooms and toss them with the onion and garlic. Season with salt and pepper, then cook until the mushrooms have released all their water. Stir in the flour and cook for about 1 minute.

5. 5

   Thicken the sauce

   Pour in the stock to deglaze the pot, then add the cream and stir well. Mix in the Tuscan seasoning and more cracked pepper. Cook over medium heat until the sauce has reduced and thickened.

6. 6

   Preheat the oven

   Preheat the oven to 200°C (400°F).

7. 7

   Coat the beans

   When the sauce is thick, turn off the heat and add the green beans. Toss gently until coated, then transfer them to a casserole dish.

8. 8

   Add topping and bake

   In a medium bowl, gently combine the panko breadcrumbs and crispy fried onions with tongs. Cover the beans evenly with the mixture. Bake for 10–15 minutes, until the topping is golden brown, and serve hot.

What is green bean casserole?

Green bean casserole is a baked side dish built around green beans in a creamy sauce, finished with a crunchy topping. It is especially associated with holiday meals in the United States, though its simple combination of vegetables and sauce suits other occasions too.

This version makes its sauce from mushrooms, stock and cream rather than relying on a prepared soup. Blanching the beans first helps them keep some bite while the casserole bakes.

Nutrition and macros by portion

The nutrition label shows one serving as written: 200 calories, 0g protein, 0g carbs, 20g fat.

The green beans and panko provide most of the carbohydrates, while olive oil, cream and fried onions contribute much of the fat. Mushrooms and cream add some protein, though this side dish is not a major protein source; serve it with a protein-rich main and another vegetable to round out the plate.

Blanching the beans

Quick cooking: the beans spend only a few minutes in boiling water before being cooled in ice water. This stops them cooking further and helps prevent them from becoming too soft in the oven.

Drying: drain the beans well on paper towels before adding them to the sauce. Excess water can loosen the creamy coating.

Building the mushroom sauce

Mushrooms: cook them until their released liquid has evaporated before adding the flour. This gives the sauce a more concentrated mushroom flavour and keeps it from becoming watery.

Flour and stock: stirring the flour into the vegetables for about a minute helps it combine with the liquid. Add the stock to deglaze the pot, then stir in the cream and let the sauce thicken.

Getting the texture right

Sauce: look for a thick consistency that clings to the beans rather than running freely around them. It will continue to coat the vegetables when they are tossed together.

Topping: spread the panko and fried onions across the whole surface so each portion gets some crunch. Keep an eye on them during baking; they are ready when golden.

Timing the casserole

Preparation: the beans and sauce are made on the hob before they go into the casserole dish. Allow the sauce to thicken before turning off the heat and adding the beans.

Baking: the recipe gives a 10–15 minute window at 200°C. Start checking at 10 minutes, since the topping can brown before the upper end of that range.

Serving ideas

As a side: serve the casserole hot alongside a roast, or with a main course and potatoes for a more substantial meal. Its creamy sauce and crisp topping bring contrast to simpler dishes.

For a balanced plate: pair a portion with a protein-rich main and another vegetable or salad. The beans make this a vegetable side, while the cream and topping make it more substantial than plain steamed beans.

Recipe notes & tips

• Have a bowl of ice water ready before the beans finish blanching.
• Drain the beans thoroughly so excess water does not thin the sauce.
• Let the mushrooms release and cook off their liquid before stirring in the flour.
• Stir the sauce as it reduces so it thickens evenly.
• Spread the topping right to the edges for an even golden finish.
• Check the casserole after 10 minutes of baking and continue only until the topping is golden.

Variations

• Vegetable stock: use it instead of chicken stock for a meat-free version.
• French beans: use them in place of standard green beans and blanch for 3–4 minutes.
• Seasoning: adjust the Tuscan seasoning and cracked pepper to suit your taste.
• Extra mushrooms: increase the mushroom portion for a more mushroom-forward casserole.
• Topping: keep the fried onions and panko together for crunch, or adjust their proportions to taste.

Common mistakes to avoid

• Overcooking the beans: blanch only for the stated time, then cool them immediately in ice water.
• Watery mushrooms: cook off their released liquid before adding the flour.
• Lumpy sauce: stir the flour into the vegetables first, then add the stock and cream while stirring.
• Loose sauce: keep it over medium heat until it reduces and thickens before adding the beans.
• Patchy topping: cover the whole surface with the panko and fried onion mixture.
• Burnt topping: check from 10 minutes and take the casserole out once it is golden.

How to store

Cool leftovers and refrigerate them in a covered container for up to 3 days. Reheat in an oven-safe dish at 180°C until piping hot; the topping may lose some of its crispness.

Frequently asked questions