Gluten-Free Classic Tuna Casserole Recipe

Gluten-Free Classic Tuna Casserole Image and Recipe
Gluten-Free Classic Tuna Casserole. Image 2011 © Teri Lee Gruss
Ratings (21)
  • Total: 50 mins
  • Prep: 15 mins
  • Cook: 35 mins
  • Yield: 6 to 8 servings

This classic gluten-free tuna casserole recipe is based on a recipe by John Mitzewich, our award-winning Expert on American Food. It's wonderful comfort food for those of us on gluten-free diets!

Use your favorite gluten-free pasta. I used 100% gluten-free corn rigatoni with very good results. Also, use canned gluten-free cream of mushroom soup for convenience or make your own homemade gluten-free cream of mushroom soup. If you make your own soup, it will add some prep time to your recipe.


  • 8 ounces gluten-free pasta (I used Sam Mills brand 100% corn gluten-free rigatoni shells)
  • 1 cup frozen sweet peas
  • 3 tablespoons butter
  • 1/2 cup sweet yellow onion (finely diced)
  • 1/2 cup red bell pepper (finely diced)
  • 4 tablespoons gluten-free sweet rice flour
  • 1 3/4 cups milk (or half and half)
  • 1 1/2 cups canned gluten-free cream of mushroom soup (or homemade gluten-free cream of mushroom soup)
  • 1 large (12-ounce) can tuna packed in water (well-drained, broken into small pieces)
  • 2 cups cheddar cheese (shredded)
  • 1 teaspoon salt
  • 1/4 teaspoon ground black pepper (or to taste)
  • 1 cup gluten-free bread crumbs (or 1/2 - 3/4 cup gluten-free cracker crumbs)

Steps to Make It

Preheat oven to 350 F / 176 C

  1. Cook gluten-free pasta in salted water, according to directions.

  2. Add frozen peas 2 minutes before pasta is done.

  3. Drain pasta and peas and rinse in cold water. Put into a large mixing bowl.

  4. Melt butter in a saucepan. Sauté onions and red pepper over med-low heat for about 3 minutes stirring occasionally.

  5. Sprinkle gluten-free sweet rice flour over vegetables, stir in and continue cooking, stirring, for another 3 minutes.

  6. Whisk in the milk, gluten-free mushroom soup, salt and pepper to taste. Stir on low heat until the mixture begins to simmer and thicken.

  7. Carefully pour cooked sauce over the cooked macaroni and peas.

  8. Add the tuna and 1 1/2 cups of the cheese and stir to combine.

  9. Pour the mixture into a 9 x 13 buttered casserole (3-quart) dish and top with the rest of the cheese.

  10. Mix gluten-free breadcrumbs or cracker crumbs with olive oil until combined and sprinkle evenly over the casserole.

  11. Bake for 35 to 40 minutes, until bubbling and browned.

Reminder: Always make sure your work surfaces, utensils, pans, and tools are free of gluten. Always read product labels. Manufacturers can change product formulations without notice. When in doubt, do not buy or use a product before contacting the manufacturer for verification that the product is free of gluten.