1. 1. Can I use fresh, frozen, or canned green beans, and do I need to cook them first?

Yes. Fresh and frozen beans should be blanched briefly in salted water, then drained very well so they do not water down the sauce. Canned beans are already soft; just drain them thoroughly and reduce the bake time slightly since they only need to heat through.

2. 2. Can I make green bean casserole in a slow cooker instead of the oven?

Yes. Combine the beans, sauce, and some of the onions in the slow cooker and cook on low until hot and bubbly, usually 2 to 3 hours. Stir or sprinkle the remaining onions on at the end so they stay crisp instead of steaming and turning soft.

3. 3. How long can green bean casserole safely sit out, and what’s the best way to reheat it?

For food safety, do not leave green bean casserole at room temperature longer than about 2 hours before refrigerating. To reheat, bake at 350°F until hot in the center (about 20 minutes), uncovering near the end to crisp the topping again.

4. 4. How can I adapt green bean casserole to be dairy free or fully vegan?

Use vegan butter or oil and swap the dairy for an unsweetened plant based milk like oat or soy. Make a simple roux with flour, broth, and dairy free milk, then use dairy free or vegan labeled fried onions (or a crumb topping) to finish.

5. 5. What can I use instead of canned fried onions for the topping?

You can make your own by coating thin onion slices in flour or crumbs, then frying or baking until crisp. Or, use a buttery panko breadcrumb topping, alone or mixed with a smaller amount of fried onions, for a crunchy finish

Green Bean Casserole from Scratch (No Canned Soup)

Description

A creamy, comforting green bean casserole made from scratch with a rich homemade sauce and crispy onions. Perfect as a cozy side dish for family dinners or special occasions.

Ingredients

Scale

2 lbs (900g) green beans, fresh or frozen, trimmed

3 tablespoons unsalted butter

3 tablespoons all-purpose flour

1 teaspoon onion powder

1 teaspoon garlic powder

1 teaspoon sea salt

1/2 teaspoon black pepper

1/4 teaspoon ground nutmeg

1 teaspoon Dijon mustard

1 1/2 cups vegetable or chicken stock

2 1/2 cups half-and-half

1 1/2 cups crispy fried onions, divided

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Instructions

Preheat oven to 375°F (190°C). Bring a pot of salted water to a boil and prepare a bowl of ice water.
Blanch green beans in boiling water for 2–3 minutes, then transfer to ice water. Drain, dry, and place in a baking dish.
In a saucepan, melt butter over medium heat. Add flour, onion powder, garlic powder, salt, pepper, nutmeg, and mustard. Whisk for 2 minutes until lightly toasted.
Slowly pour in stock while whisking, then add half-and-half. Simmer and stir until the sauce thickens, about 5 minutes.
Stir in half of the crispy onions. Pour sauce over beans and mix gently. Bake uncovered for 20 minutes.
Stir lightly, top with remaining onions, and bake another 10 minutes until golden and bubbling.
Let rest for 5 minutes before serving.

Notes

Blanching keeps the beans bright and tender, not mushy.

Stir the sauce constantly to avoid lumps.

You can use vegetable stock for a fully vegetarian version.

Best served fresh while the topping is crispy.

Prep Time: 15 minutes
Cook Time: 30 minutes
Category: Side Dish
Method: Baked
Cuisine: American

Nutrition

Serving Size: 1 portion
Calories: 220
Sugar: 5g
Sodium: 460mg
Fat: 15g
Saturated Fat: 8g
Unsaturated Fat: 7g
Trans Fat: 0g
Carbohydrates: 16g
Fiber: 3g
Protein: 4g
Cholesterol: 38mg