Crispy Cod Burger with Wasabi Mayo & Fried Pickles

Cut the cod into strips. Fry them. Stack pickles on top. That’s it, except the wasabi mayo makes it sing. Twenty minutes of prep, twelve of heat, and you’ve got something that tastes like it took way longer.

Why You’ll Love This Fried Fish Burger

Takes 32 minutes total. Actual cooking is twelve. The rest is just chopping and waiting for oil to heat.

Wasabi mayo hits different. Not overpowering—just enough heat to make you notice. The lime juice softens it. Works with everything.

Sparkling water in the batter. Creates this crispy shell that shatters when you bite it. Regular water doesn’t do that. Neither does beer. Sparkling does.

Fried pickles aren’t a side here. They’re part of the sandwich. Hot, crispy, tangy. Crunches through the soft fish. Cold lettuce underneath. It’s all five textures at once.

Can’t really mess this up if you keep the oil hot.

What You Need for Crispy Cod with Wasabi Mayo

Cod fillets—four pieces, fairly thick. Thinner stuff falls apart. Thicker holds together better.

Wasabi paste. The real stuff from a tube, not powder mixed with water. Tastes sharper. More controlled.

Mayo, lime juice, green onion. That’s the whole sauce. Green onion finely chopped—not sliced. Fine bits dissolve better into the mayo.

All purpose flour. Nothing fancy. Mix some with cold sparkling water and tarragon. The sparkling water creates tiny bubbles. That’s what makes it crispy. Still water won’t. Beer might, but sparkling’s more reliable.

Dill pickles. Thick slices. Thin ones get soggy fast.

Boston lettuce. Butter lettuce works too. Iceberg’s too watery. Romaine’s too rough.

Sandwich buns. Slightly elongated ones work best—they fit the fish strips and pickles without falling apart. Toast them. Soft buns go soggy fast.

Vegetable oil. Enough to fill a pot about four inches deep, or use a fryer if you have one.

How to Make Fried Fish Burgers

Start with the mayo. Chop the green onion fine—like actually fine, small pieces. Mix it with mayo, lime juice, and wasabi. Stir until it’s smooth and the color’s even. Chill it. Brightness matters here. The lime cuts the wasabi’s heat. Too much mayo and you lose both. Too little and it’s just spicy paste.

Heat the oil to 175 C (350 F). Use a thermometer. Not a guess. Oil too cool turns everything soggy. Too hot and the outside burns before the inside cooks. Right in the middle is the only place this works. Let it sit for a few minutes after it hits temp. Oil needs to stabilize.

Spread out half the flour on a plate. That’s your dry coating station. Mix the rest of the flour with cold sparkling water and tarragon in a bowl. Stir it gently—lumps are good here. Lumps mean you didn’t overdevelop the gluten. Smooth batter gets tough. Salt and pepper the batter. You’ll taste the difference after frying. It won’t taste salty going in, but it will when it comes out.

Take two pieces of cod. Dust them lightly with the dry flour. The flour helps the batter stick. Dip them in the batter, let the excess drip off for a second, then slide them into the oil. You should hear a steady sizzle. Not a violent crackle. Not a muffled hiss. Just steady heat working. After three to four minutes, they’ll puff up and turn golden. Flip them. Let them cook another minute or two on the other side until they’re crispy all around. Pull them out onto a wire rack set over a baking sheet. The rack keeps the bottom from steaming itself soggy.

Do the same with the pickles. Dry flour, dip in batter, fry. They cook faster—maybe two to three minutes total. They’ll bubble and turn golden. Watch them closer because smaller things finish quicker. Keep them somewhere warm so they stay crispy but don’t brown more.

Toast the buns. Split side down in a pan, thirty seconds, done. While they’re warm, spread the wasabi mayo on both sides. It spreads easier when warm. Layer Boston lettuce on the bottom half—that’s your cool crunch base. Add cod strips and fried pickles alternately. They should balance. One piece of fish, one of pickle, back and forth. Top bun goes on. Serve it now. Don’t wait around. The batter softens fast once it hits mayo and lettuce.

Fried Pickle Appetizer Tips and Crispy Cod Tricks

The sparkling water—cold matters. Room temperature water doesn’t create the same bubbles. Cold does. The temperature difference is part of why it works.

Batter thickness. Too thick and you get a hard shell with wet inside. Too thin and you lose the crunch. You want it the consistency of pancake batter. Not thinner. Not thicker.

Oil temperature. Really the only thing that kills this. Too cool makes everything absorbent and limp. Too hot burns the coating before the fish is done. 175 C is exact. If your thermometer’s off, it all falls apart.

Tarragon’s doing something. It’s not obvious but it matters. Basil works. Dill works less well. Skip it entirely and you’ll notice.

Pickles get watery inside sometimes. Thicker slices help. Dill pickles specifically—the brine adds salt and tang that works with wasabi. Sweet pickles don’t.

Boston lettuce vs anything else. Iceberg’s too crisp and bland. Arugula’s too peppery. Spinach gets wet. Boston’s soft, tastes like nothing, just adds cool. That’s what you want.

Bun toasting. Thirty seconds. That’s it. More and they’re crunchy. Less and they’re soft. Thirty seconds is the band between both.

Don’t make the mayo too far ahead. Day-old mayo tastes muffled. Fresh tastes sharp. Make it maybe an hour before you eat. No longer.

Crispy Cod Burger with Wasabi Mayo & Fried Pickles

By Emma

Prep:

20 min

Cook:

12 min

Total:

32 min

Servings:

4 servings

Ingredients

• Wasabi Mayonnaise
• 80 ml (1/3 cup plus 1 tbsp) mayonnaise
• 1 small green onion finely chopped
• 12 ml (2 1/2 tsp) fresh lime juice
• 3 ml (1/2 tsp) prepared wasabi paste
• Fried Cod and Pickles
• 170 g (1 cup plus 2 tbsp) all purpose flour
• 180 ml (3/4 cup) cold sparkling water
• 12 ml (1 tbsp) chopped fresh tarragon
• 400 g (14 oz) cod fillets cut into 4 strips
• 1 large dill pickle cut into 4 thick slices
• Vegetable oil for frying
• Garnish
• 4 slightly elongated sandwich buns split in half
• Boston lettuce leaves

Method

1. Wasabi Mayonnaise
2. 1 Chop green onion very fine. Mix with mayo, lime juice, and wasabi until combined and cool. Keep chilled. Bright acid balances the wasabi's fire. We want it sharp but not overpowering.
3. Frying Setup
4. 2 Heat oil in deep fryer or heavy pot to 175 C (350 F). Use thermometer, no guesswork here. Oil must be hot but not smoking – battles between soggy and burnt happen right now.
5. Batter and Flour Prep
6. 3 Spread out 70 g (1/2 cup plus a spoon) flour on a plate – dry coating step. Mix remaining flour with cold sparkling water and chopped tarragon gently. Mixture must stay lumpy to avoid gluten toughening. Salt, pepper in the batter, taste shows itself after frying.
7. Coating and Frying Cod
8. 4 Dust two pieces of fish lightly with dry flour to help batter stick. Dip into batter, let excess drip off, then slide carefully into hot oil. Listen for sizzle that stays steady, not frantic or muffled. Flip after about 3-4 minutes or when golden and puffed, then crisp all around. Drain on wire rack over baking sheet to keep bottom from steaming.
9. Frying Pickles
10. 5 Same process for pickles: dry flour first, dip in batter, fry 2-3 minutes until bubbly and golden. Watch close, smaller pieces cook faster. Keep warm but watch so they don’t lose crunch.
11. Assembly
12. 6 Toast cut buns. Spread wasabi mayo thickly on cut sides while warm – spreads easier that way. Layer Boston lettuce to provide cool crunch, then add cod pieces and fried pickles alternately. The hot-cold-cream-crisp mix should hit all points.
13. 7 Serve immediately. Don’t wait – batter can go soggy fast. If needed, rest fish on rack in warm oven (about 90 C) but only for short time.

Nutritional information

Calories

420

Protein

25g

Carbs

35g

Fat

22g

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Frequently Asked Questions About Seafood Burger Recipes

Can you use a different white fish instead of cod? Halibut works great. So does haddock. Avoid anything too delicate—sole falls apart. Tilapia’s fine but bland. Cod and halibut are best.

What if you don’t have sparkling water? Regular water works. Just won’t be as crispy. Cold beer adds flavor but makes it harder to predict the crunch. Stick with sparkling if you can.

How do you know when the oil’s the right temperature without a thermometer? Don’t do it without one. A piece of batter should sizzle immediately and rise to the surface in about ten seconds. But that’s not reliable enough. Get a thermometer.

Can you make the wasabi mayo ahead of time? Yeah. But refrigerate it. It tastes better fresh though. Lime juice fades. Wasabi mellows. Make it within an hour of eating.

Do the pickles have to be dill? Dill’s ideal. Bread and butter pickles work but taste sweeter. Spicy pickles double down on heat. Depends what you want.

Can you bake these instead of fry? No. The whole point is the crispy batter. Baked turns soft and steamed. Not worth it.

What if the batter starts sticking to the fish? Too warm. The batter’s cooking too fast. Oil might be hotter than your thermometer says. Lower temp slightly. Wait a minute. Try again.