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Cod au Gratin

Classic Canadian Dish: Cod Au Gratin with Crispy Breadcrumb Topping

This comforting Newfoundland and Labrador favourite stars cod, coddled by a cheesy creamy sauce. Cod Au Gratin can be the main event of a meal paired with some garlic bread and maybe a salad or served on top of mashed potatoes or rice.
5 from 2 votes
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Course: Main Course
Preparation: Baking
Prep Time: 25 minutes
Cook Time: 40 minutes
Total Time: 1 hour 25 minutes
Servings: 4
Author: Gabby Peyton

Ingredients

  • 1 1/2 lbs cod fillets (deboned and skinned)
  • pinch salt
  • 1 Tbsp canola oil
  • 1 yellow onion peeled and diced
  • 3 Tbsp butter plus 2 Tbsp for crispy breadcrumb topping
  • 3 Tbsp flour
  • 2 cups milk
  • 1/2 tsp salt
  • 1 Tbsp lemon zest
  • 1/2 tsp freshly ground black pepper plus more for topping
  • 1 tsp dried oregano
  • 1 cup breadcrumbs
  • 1 cup Parmesan cheese grated
  • 2 cups cheddar cheese grated
Imperial - Metric

Instructions

  • Preheat the oven to 375°F (190°C).
  • Cut cod into bite-sized chunks and place in a casserole dish and season with a little salt. (Note: If using frozen cod, make sure to thaw completely and pat dry with a paper towel to remove excess moisture.)
  • In a saucepan, heat canola oil on medium heat, add the onion and cook until just softened around 5 minutes.
  • Add the 3 Tbsp (45 mL) of butter to the onion and melt, add 3 Tbsp (45 mL) of flour to make the roux. Slowly add 2 cups (500 mL) of milk to thicken and make a sauce.
  • Once thickened, add 1/2 tsp (2 mL) salt, lemon zest, 1/2 tsp (2 mL) pepper and 1/2 tsp (2 mL) oregano and stir to combine. Then add 1/2 cup (125 mL) of the grated parmesan and 1/2 cup (125 mL) of cheddar cheese. Mix.
  • Pour sauce over the cod and make sure it’s fully coated.
  • To make crispy breadcrumb topping: melt 2 Tbsp (30 mL) butter in the microwave. In a medium bowl, add melted butter to breadcrumbs, then stir in half the remaining cheeses (about 1 cup/250 mL).
  • Use remaining 1 cup (250 mL) of cheeses to cover the cod and sauce. Top with breadcrumb mixture and sprinkle with more black pepper and 1/2 tsp (2 mL) of oregano.
  • Bake for 40 minutes or until brown and bubbly.
  • Let cool for at least 20 minutes to set before serving. Can be served on its own with lemon wedges or on top of potatoes or rice.
Nutrition Facts
Classic Canadian Dish: Cod Au Gratin with Crispy Breadcrumb Topping
Amount per Serving
Calories
830
% Daily Value*
Fat
 
49
g
75
%
Saturated Fat
 
26
g
163
%
Trans Fat
 
1
g
Polyunsaturated Fat
 
3
g
Monounsaturated Fat
 
14
g
Cholesterol
 
185
mg
62
%
Sodium
 
1760
mg
77
%
Potassium
 
610
mg
17
%
Carbohydrates
 
36
g
12
%
Fiber
 
3
g
13
%
Sugar
 
9
g
10
%
Protein
 
61
g
122
%
Vitamin A
 
1368
IU
27
%
Vitamin C
 
6
mg
7
%
Calcium
 
998
mg
100
%
Iron
 
3
mg
17
%
* Percent Daily Values are based on a 2000 calorie diet.