Homemade Gluten-Free Green Bean Casserole

Serves 10

Green Bean Casserole is hands-down my husband’s favorite holiday side. I challenged myself to make a fresh, gluten-free green bean casserole that would knock his socks off. I used fresh green beans and a delicious homemade mushroom sauce. He loves it.



  • 4 cloves garlic, whole
  • 1¼ pounds. green beans, trimmed, cut into 1-inch pieces
  • 2 tablespoons plus 2 teaspoons salt, divided
  • 3 tablespoons unsalted butter
  • 1 medium yellow onion, small dice
  • 4 stalks celery, small dice
  • ½ pound button mushrooms, rinsed, stems removed, diced
  • 2 cloves garlic, minced
  • 3 tablespoons arrowroot powder
  • 2 cups whole milk
  • ¾ teaspoon black pepper
  • ½ teaspoon ground nutmeg
  • ½ cup white rice flour
  • ¼ cup yellow cornmeal
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1 teaspoon salt
  • 1 teaspoon black pepper
  • 1 large white onion, sliced into thin rings
  • 2-3 cups safflower or vegetable oil


Preheat oven to 350° F.

Place 4 garlic cloves in a large pot, fill with water and bring to a boil. Add the green beans and 2 tablespoons of salt. Cook until the beans are soft, about 8-10 minutes. Drain in a colander and then immediately place the beans into a bowl of ice water. This will stop the cooking process. Once the beans are cold, drain and remove garlic cloves. Lay beans out on a plate and pat dry with a towel.

Melt the butter in a large sauté pan over medium heat. Add the onion and celery. Cook until soft, about 5-6 minutes. Add the mushrooms and cook until they release some of their liquid, stirring occasionally, about 4-5 minutes. Add minced garlic and cook for 1 minute. Sprinkle in arrowroot powder and stir until completely absorbed. Slowly stir in the milk. Cook for 7-10 minutes, until gooey and thick, stirring often. Turn off the heat and add pepper, nutmeg and the remaining 2 teaspoons salt. Add the cooked green beans and mix well.

Pour green bean mixture into a 13 x 9-inch baking dish. Bake for 30 minutes or until hot and bubbly.

Meanwhile, to make the topping, mix the rice flour, cornmeal, garlic powder, onion powder, salt and pepper in a medium bowl. Toss the onions in the flour mixture. Heat the oil in a medium sauté pan or cast iron skillet over medium heat. When the oil is hot, fry onion rings in small batches until golden brown, 1-2 minutes. Drain on paper towels and sprinkle with salt while still hot.

Top the baked green bean casserole with the fried onions. Serve warm.

Make-ahead tips

* Make the mushroom sauce up to 2 days in advance and store in the fridge. Bring it to room temperature when you’re ready to bake.

* Rinse, trim and cut the green beans the day before. Store them in a zip-top bag in the fridge until you’re ready to cook them.

* Mix the dry ingredients for the onion topping a couple of days in advance. Keep in a medium airtight container. When you’re ready, add the sliced onions, mix, and they’re ready to fry.

Nutrition Analysis: 530 cal, 50 g fat, 15 mg chol, 2130 mg sodium, 22 g carbs, 3 g fiber, 6 g sugar, 5 g protein.

Lauren Marie, who writes the popular gluten-free food blog LaurenMarieGlutenFree.com, never lets her gluten allergy hold her back from enjoying the delicious things in life.