Introduction to the Classic Cod Au Gratin

If you’re a fan of comforting, creamy, and cheesy seafood dishes, then you are in for a treat with this gluten-free Newfoundland Cod Au Gratin. This is a beloved East Coast Canadian recipe, deeply rooted in Newfoundland’s rich fishing history.

Cod is an integral part of Newfoundland’s culinary tradition, and this dish elevates it with a rich, cheesy sauce and a crispy topping that makes it irresistibly delicious. The best part? It’s completely gluten-free, so everyone can enjoy it without worry.

Why This Cod Au Gratin Recipe Stands Out

Many recipes for Cod Au Gratin exist, but what makes this one special is its combination of fresh, flaky fish, a luxuriously creamy sauce, and a perfectly crisp topping. By using gluten-free alternatives like cornstarch or potato starch, this recipe stays true to tradition while catering to dietary needs.

Not only is this dish incredibly flavorful, but it is also packed with high-protein content, making it an excellent meal option for those who want a nutritious yet indulgent seafood dish.

Ingredients Breakdown and Substitutions

Let’s take a closer look at the ingredients and how they come together to create this decadent dish:

Fresh Cod Loins (2 lbs)

• This is the star of the show. Fresh boneless cod loins provide a tender, flaky texture. If you’re using frozen fish, make sure to thaw and drain it properly.

Butter (¼ cup)

• Essential for making the roux, butter adds richness and depth to the creamy sauce.

Onion (½ small, finely chopped)

• Adds a mild sweetness and depth to the dish. Yellow or white onions work best.

Garlic (2 cloves, minced or pressed)

• Brings a touch of aromatic flavor that complements the creaminess of the dish.

Cornstarch or Potato Starch (¼ cup)

• This gluten-free thickener ensures the sauce reaches the perfect consistency.

Dijon Mustard (1 tbsp)

• Adds a subtle tangy depth to the sauce that balances the richness of the cheese and butter.

Dry White Wine (¼ cup)

• Enhances the flavor complexity. If you prefer to keep it alcohol-free, you can substitute with chicken or vegetable broth.

Milk (2 ¼ cups)

• Creates the creamy base of the sauce. You can use whole milk for a richer texture or a lower-fat alternative.

Parmesan Cheese (⅔ cup, shredded)

• Brings a bold, salty, umami flavor to the sauce and topping.

Cheddar Cheese (1 cup, shredded)

• Aged cheddar works best for a sharp, melty finish.

Dried Summer Savory (2 tsp)

• This herb enhances the overall flavor and is commonly used in Newfoundland cuisine.

Salt & Pepper (to taste)

• Essential for seasoning the dish perfectly.

Plain Potato Chips (1 small bag, crumbled)

• The crispy topping that gives this dish its signature texture. You can also use gluten-free breadcrumbs as an alternative.

Step-by-Step Instructions for the Best Cod Au Gratin

Step 1: Preheat Your Oven

• Set your oven to 350°F (180°C) to ensure even baking.

Step 2: Prepare the Fish

• Cut fresh cod into 1-inch pieces and place them in an 8×8-inch glass baking dish or divide them into individual ramekins.

Step 3: Make the Creamy Cheese Sauce

1. In a medium saucepan, melt butter over medium heat.
2. Add finely chopped onion and minced garlic. Stir frequently and cook until onions become soft and translucent.
3. Stir in cornstarch and cook for another minute, ensuring it combines well with the butter mixture.
4. Whisk in Dijon mustard until fully incorporated.
5. Slowly add dry white wine, whisking continuously until smooth. Let it cook for 2 minutes.
6. Gradually pour in the milk, whisking constantly to prevent lumps. Heat until the mixture thickens.
7. Stir in half of the Parmesan and a handful of cheddar cheese. Continue stirring until the cheese melts and the sauce becomes smooth.
8. Add dried summer savory, salt, and pepper to taste.

Step 4: Assemble the Dish

1. Pour the creamy cheese sauce over the cod, ensuring all pieces are well coated.
2. Sprinkle the remaining cheddar cheese evenly across the top.
3. Top with the remaining Parmesan cheese for an extra cheesy crust.
4. Finish by evenly spreading the crumbled potato chips over the dish.

Step 5: Bake to Perfection

• Bake uncovered for 35 minutes if using individual ramekins or about 50 minutes if using an 8×8-inch dish.
• The dish is ready when the fish is fully cooked, and the sauce is bubbling with a golden, crispy topping.

Expert Tips for the Best Gluten-Free Cod Au Gratin

• Use High-Quality Cod: Fresh wild-caught cod works best for the most authentic flavor.
• Don’t Skip the Mustard: The Dijon mustard adds a subtle but important depth of flavor.
• Let It Rest: Allow the dish to sit for a few minutes before serving to help the sauce set.
• Pair It Right: Serve with a side of steamed vegetables, mashed potatoes, or a fresh green salad for a complete meal.

Health Benefits of Cod Au Gratin

Cod is an excellent source of lean protein, vitamins, and omega-3 fatty acids, making this dish a great option for a well-balanced meal. The combination of cheese and milk provides calcium, while the addition of summer savory brings a boost of antioxidants.

Storing and Reheating Tips

• Refrigeration: Store leftovers in an airtight container for up to 3 days.
• Freezing: While possible, freezing may alter the texture of the sauce.
• Reheating: Warm in the oven at 300°F (150°C) until heated through.