How do you make green bean casserole with sour cream?

To make green bean casserole with sour cream, combine parboiled green beans, sautéed mushrooms, flour, chicken stock and milk with the sour cream in a casserole dish. Top with Parmesan cheese, paprika, soy sauce, pepper and caramelized onions and bake for 15 minutes until bubbly.

To make green bean casserole using sour cream, first butter a casserole dish, then dust it with grated Parmesan cheese. Caramelize 2 medium onions for 30 minutes over medium-low heat in 2 tablespoons of vegetable oil, then set aside. Boil 1 1/2 pounds of green beans in salted water for two minutes, then drain and plunge into a bowl of ice water, drain, and set aside. Preheat your oven to 450 degrees Fahrenheit.

Sauté 1 pound of mushrooms in 2 tablespoons of vegetable oil over medium-high heat for five minutes, then sprinkle with 2 tablespoons of flour, and stir with a wooden spoon to form a paste. Pour in 1 cup of chicken stock, lower the heat and simmer for two minutes before stirring in 1 cup of sour cream and 1/2 cup of milk. Simmer and stir occasionally for five minutes, then pour the sauce into the bowl of green beans. Top the mixture with 1/4 cup of grated Parmesan, 1/2 teaspoon of paprika, 1 teaspoon of soy sauce and 1/4 teaspoon of black pepper. Place the mixture in the casserole dish, top with the onions and 2 tablespoons of butter, bake for 15 minutes, then serve.