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Baked French Onion Butter Rice Casserole

A close-up serving of creamy french onion butter rice topped with caramelized onions.

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A rich and savory baked rice casserole flavored with deeply caramelized onions and butter, inspired by French Onion Soup.

Ingredients

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  • 1 tablespoon olive oil
  • 2 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter, divided
  • 1 teaspoon salt, divided
  • 1/2 teaspoon black pepper, divided
  • 1 1/2 cups long-grain white rice, uncooked
  • 2 1/2 cups beef broth
  • 1/2 cup water
  • 1/4 cup dry sherry or dry white wine (optional)
  • 1/2 cup shredded Gruyère cheese

Instructions

  1. Preheat your oven to 375 degrees Fahrenheit. Lightly grease an 8×8 inch baking dish.
  2. Heat the olive oil and 2 tablespoons of butter in a large skillet over medium heat. Add the sliced onions, 1/2 teaspoon of salt, and 1/4 teaspoon of pepper. Cook slowly, stirring occasionally, for 20 to 25 minutes until the onions are deeply browned and caramelized. Remove the onions from the skillet and set aside.
  3. In the same skillet, melt the remaining 2 tablespoons of butter over medium heat. Add the uncooked rice and toast for 2 minutes, stirring constantly until the edges look slightly translucent.
  4. Pour in the beef broth, water, sherry (if using), the remaining 1/2 teaspoon of salt, and 1/4 teaspoon of pepper. Bring the mixture to a boil.
  5. Stir in the caramelized onions. Pour the entire rice mixture into the prepared baking dish.
  6. Cover the baking dish tightly with aluminum foil. Bake for 35 minutes.
  7. Remove the foil. Sprinkle the Gruyère cheese evenly over the top of the rice.
  8. Return the dish to the oven, uncovered, and bake for an additional 10 minutes, or until the cheese is melted and bubbly and the rice is tender. Let stand for 5 minutes before serving.

Notes

  • For deeper flavor without alcohol, substitute the sherry with 1/4 cup of strong brewed black tea.
  • Use high-quality beef broth for the best results, as it forms the base of the soup flavor.
  • If you prefer a creamier texture, stir in 1/4 cup of heavy cream after the rice is cooked but before adding the cheese.

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