American Style Green Bean Casserole for THANKSGIVING

In the States, it is pretty simply to prepare a traditional green bean casserole... You just take a cream of mushroom soup from Campbell ;) This time, I made it from scratch with a creamy flour roux and crispy onions (french onions) on top - for a traditional Thanksgiving Dinner with my friends :)


  • 1 tablesspoon butter
  • 1 onion - finely diced
  • 250 g fresh cremini mushrooms - sliced
  • salt, pepper
  • 750 g princess beans (frozen)
  • 1 l salt water and 1 l ice water
For the sauce (roux)
  • 4 tablespoons butter
  • 1 small onion - finely diced
  • 2 tablespoons flour
  • 400-500 ml milk
  • 20 g parmesan cheese
  • salt, pepper, nutmeg, cayenne pepper
For the topping:
  • 30 g parmesan cheese (grated)
  • 25 g crispy onions (french onions)


  1. Prepare the mushrooms: Melt the butter in a frying pan. Add the onions and mushrooms and sauté till onions are translucent and mushroms don't water anymore. Add salt and pepper, remove from heat.
  2. Blanch the beans: Heat up salt water, add the frozen beans and cook for 7 minutes till almost done. Then, use a splotted spoon and plunge the beans into ice water for a minute. Remove the beans from the water and set aside.
  3. Prepare the roux: Melt the butter in a small pot, add the diced onion and sauté till translucent. Add the flour, stir frequently and cook for 1-2 min. Then gradually add the milk and keep stirring, add salt, pepper, nutmeg, cayenne pepper and the cheese and stir. Add the mushrooms and beans and mix everything together.
  4. Bake the casserole: Pour the mix into a greased casserole. Sprinkle with the rest of the parmesan cheese and crispy onions and cover with tin foil. Bake at 350 degree Fahrenheit for 30 minutes, remove the tin foil and bake at 390 degree Fahrenheit for additional 15 minutes.

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