Crispy Cod Fish Sandwich

Name: Filet-O-Fish But Better
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Ingredients: 4 4-ounce skinless cod fillets; 4 slices American cheese or sharp cheddar; 4 brioche buns; 1 tbsp butter; Avocado oil for frying; 3 eggs; 1 tsp mustard; 1 tsp mayonnaise; ½ tsp onion powder; ½ tsp cajun seasoning (optional); 1 cup flour; 1/4 cup potato starch; 1/2 tsp onion powder; 1/2 tsp garlic powder; 2 cups panko breadcrumbs; ½ cup mayonnaise; 2 tbsp relish or diced dill pickles and tsp pickle juice; 2 tbsp fresh dill (or 1 tsp dried dill); 1 tbsp diced capers (can sub for parsley if you dislike capers); 1/2 tsp onion powder; 1 tbsp lemon juice; 1 tsp lemon zest; 1/4 tsp salt; 1/4 tsp black pepper

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Ever wonder how to make a delicious Crispy Cod Fish Sandwich? Well let's recreate the McDonald's Filet-O-Fish sandwich but make it way better! This copycat recipe takes a classic fast-food favorite and upgrades it with tender wild caught cod fish filet nestled between buttery soft brioche buns. It is a true comfort food delight. With our homemade version, you can enjoy all the flavors of the original, elevated to gourmet perfection with our homemade tartar sauce recipe. It is simply the best fish sandwich and my ultimate guilty pleasure!

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Golden crispy cod fish sandwich with cheese and dill sauce, served with seasoned fries on a wooden platter.

If you want another delicious sandwich recipe try my Grilled Chipotle Chicken Sandwich! Or for more quick recipes check out my One-Pan Garlic & Lemon Salmon Orzo and my One-Pan Mediterranean Cod.

This Crispy Cod Fish Sandwich brings me back to summers with my grandmother in France. Weird right?! You would think pain au chocolat would be my core memory haha! It was one of her favorite things to order from McDonalds along with a caramel sundae, yum! I remember having to eat like two to feel satiated because they were so small - yes I had a very large appetite as a kid haha! This version is more robust and leaves you feeling both nostalgic and satiated.

A Little History

But how did this delight come about?

The Crispy Cod Fish Sandwich or Filet-o-fish dates back to the early 1960s. McDonald's franchise owner Lou Groen faced a dilemma during Lent—a period when many Catholics abstain from eating meat on Fridays. In an effort to attract customers during this time, Groen developed the Filet-O-Fish sandwich as a meatless alternative. Despite initial skepticism, the Filet-O-Fish quickly gained popularity and became a permanent fixture on the McDonald's menu.

Crispy Cod Fish Sandwich Video

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Why You'll Love This Recipe

Quality Ingredients: With fresh wild caught cod filets, buttery brioche buns, and homemade tartare sauce, this recipe uses high-quality ingredients to create a gourmet twist on a fast-food favorite.

Family-Friendly: Perfect for a fun family cooking activity or a satisfying weeknight dinner, our homemade Filet-O-Fish is a crowd-pleaser that will have everyone coming back for seconds.

Nostalgic Comfort: Whether you grew up enjoying Filet-O-Fish sandwiches or you're simply craving a taste of nostalgia, this recipe brings all the comfort and familiarity of your favorite fast-food indulgence right to your dining table.

Easy to Make: With straightforward instructions and simple ingredients, our homemade Filet-O-Fish is easy to whip up whenever the craving strikes. No need to wait in line at the drive-thru—just cook and enjoy!

Ingredient Notes

Full recipe, instructions and photos in the recipe card at the end of the post

Cod Fish Fillets: Opt for fresh, sustainably sourced cod filets for the best flavor and texture. If cod is unavailable, you can substitute with other white fish varieties such as haddock or pollock.

Cheese: American cheese or sharp cheddar adds a creamy, melty goodness to the Filet-O-Fish sandwiches. Feel free to use your favorite kind of cheese or omit it altogether for a dairy-free option.

Brioche Buns: The buttery richness of brioche buns elevates the sandwich to gourmet levels. Soft and slightly sweet, they provide the perfect base for the crispy fish and tangy tartar sauce. If you don't have brioche buns, you can use regular hamburger bun.

Eggs, Mustard, Mayonnaise: These ingredients form the base of the batter, providing structure and helping the panko breadcrumbs adhere to the fish.

Flour and Potato Starch: A combination of all-purpose flour and potato starch creates a light and crispy coating for the fish, ensuring a perfect crunch with every bite.

Panko Breadcrumbs: Panko Japanese breadcrumbs provide a superior crunch compared to traditional breadcrumbs, resulting in a more satisfying texture for the fried fish.

Close-up of a crispy chicken burger with cheese and sauce on a wooden board.

What can I serve with the Crispy Cod Fish Sandwiches? Classic accompaniments include crispy fries or coleslaw. Or for healthier alternatives, check my Mediterranean Salad or Roasted Vegetables.

Instructions

Full recipe, instructions and photos in the recipe card at the end of the post

Fish

Start by patting your fish fillets dry, then season both sides with salt and pepper to bring out their natural flavor.

Tartar Sauce

Finely chop your pickles (or use dill relish for ease), then mince some fresh dill and capers. Mix everything together with mayo, a touch of mustard, onion powder, lemon zest and juice, plus a pinch of salt and pepper. Set aside—this sauce is magic on the sandwich.

Egg Batter

Crack a few eggs into a shallow bowl and whisk them with onion powder, garlic powder, and Cajun seasoning. This gives your fish that flavorful coating that clings just right.

Breading

In another dish, mix flour with potato starch, garlic powder, and onion powder. This is your first dredge layer—helps everything else stick. Place your panko breadcrumbs on a plate.

Dredging & Cook

To bread the fish: coat each fillet in the flour mixture, dip in the seasoned egg, and finish with a panko coating. Press gently to ensure it sticks. Heat your oil in a deep pan to 325°F. Fry the fillets in batches, about 4–5 minutes per side, until golden brown and cooked through (internal temp should be 145°F). Let them rest on a wire rack, and if you’re using cheese, place a slice on top while they’re hot so it gently melts.
In the meantime, toast your brioche buns in a pan with a bit of butter until golden.

FAQ

Can I use frozen cod filets for this recipe?

Yes, I used frozen cod filets from Sprouts, but be sure to thaw them completely before cooking. Pat them dry with paper towels to remove excess moisture before breading and frying.

Can I make this recipe gluten-free?

Absolutely! Substitute the all-purpose flour and panko breadcrumbs with gluten-free alternatives. Use gluten-free flour for the batter and gluten-free breadcrumbs for coating the fish.

How do I prevent the fish from getting soggy after frying?

To keep the fish crispy, it's essential to drain it well after frying. Place the fried cod filets on a wire rack set over a baking sheet to allow any excess oil to drip off.

Can I bake the fish instead of frying it?

While frying gives the fish a crispy exterior, you can bake the cod filets for a healthier alternative. Preheat your oven to 400°F (200°C) and bake the breaded fish on a parchment-lined baking sheet for 15-20 minutes, or until golden brown and cooked through.