Introduction

Traditional Newfoundland Cod Au Gratin is a comforting baked dish showcasing tender cod in a creamy, cheesy sauce topped with crunchy potato chips. This classic recipe brings together simple ingredients for a hearty meal perfect for family dinners.

Two white oval baking dishes filled with creamy, baked casserole are shown on a white marbled surface. The casserole has a golden-brown crust made of crunchy crumbs and melted cheese with some slightly burnt spots. The base layer is a smooth white sauce visible around the edges, topped with a crumbly golden yellow layer mixed with small green herbs sprinkled throughout. The texture on top is uneven with crispy bits and melted cheese pools, creating a rich and inviting look. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 lbs Fresh Boneless Cod Loins
1/4 cup Butter
½ Small Onion (finely chopped)
2 Garlic Cloves (pressed or minced)
1/4 cup Corn Starch (or Potato Starch if needed)
1 Tbsp Dijon Mustard
1/4 cup Dry White Wine
2 1/4 cups Milk
2/3 cup Shredded Parmesan Cheese
1 Cup Shredded Cheddar Cheese
2 tsp Dried Summer Savoury
Salt & Pepper, to taste
1 Small bag Plain Potato Chips (crumbled)

Instructions

Step 1: Preheat oven to 350°F (180°C). Cut cod into 1-inch pieces and arrange them in an 8×8-inch baking pan or divide evenly among 4-6 individual ramekins. Set aside.
Step 2: In a medium saucepan, melt butter over medium heat. Add chopped onion and garlic, cooking while stirring frequently until onions are tender and translucent.
Step 3: Stir in the corn starch and cook for another minute, stirring constantly. Add Dijon mustard and whisk to combine thoroughly.
Step 4: Slowly pour in the dry white wine while whisking until the mixture is smooth. Cook for about 2 minutes, stirring often.
Step 5: Gradually add milk while whisking constantly. Continue heating until the sauce begins to thicken.
Step 6: Once thickened, stir in half of the Parmesan cheese and a small handful of cheddar until melted and the sauce is smooth. Add dried summer savoury, then season with salt and pepper to taste.
Step 7: Pour the sauce over the cod pieces in the baking dish, stirring gently to coat and spread evenly.
Step 8: Sprinkle the remaining cheddar and Parmesan cheeses evenly over the top. Then, spread crumbled potato chips on the surface for a crunchy topping.
Step 9: Bake uncovered for about 35 minutes if using ramekins, or 50 minutes if using an 8×8-inch pan, until the fish is cooked through and the sauce is bubbly and golden.
Step 10: Remove from the oven and serve hot for a satisfying meal.

Tips & Variations

Substitute potato starch for corn starch if you need a gluten-free option.
Try adding a pinch of smoked paprika or cayenne for a subtle spicy kick.
Use crushed crackers or breadcrumbs instead of potato chips for a different crunchy topping.
For extra richness, stir in a splash of cream to the sauce before baking.

Storage

Store any leftovers in an airtight container in the refrigerator for up to 2 days. Reheat gently in the oven at 325°F (160°C) until warmed through to maintain crispiness of the topping. Avoid microwaving to keep the potato chip crust crunchy.

How to Serve

A rustic white ceramic dish filled with a creamy baked gratin featuring a golden-brown crust of melted cheese and crispy potato flakes sprinkled with small bits of herbs. The top layer is bubbling with brown spots and crunchy textures, while the creamy white sauce beneath peeks through the edges, showing a smooth and luscious consistency. The dish is set on a white marbled surface, with the gratin slightly overflowing on one side, adding an inviting homemade feel. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use frozen cod for this recipe?

Yes, frozen cod can be used. Make sure to thaw it completely and pat dry before preparing to prevent excess moisture in the dish.

What can I substitute for summer savoury?

If you don’t have dried summer savoury, thyme or marjoram are good alternatives that complement the flavors well.