Low Carb Keto Fish Tacos

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This Keto Fish Tacos recipe is my healthy low-carb take on this Mexican dinner classic. Think roasted salmon, slaw, a cilantro jalapeño yoghurt salsa and avocado, all served in a homemade taco shell!

two salmon fish tacos

We’ve made these easy tacos every single week for an entire month now. We just can’t get enough of them!

I love Mexican flavors, and tacos are always a favourite in or house. Normally, we stick to the meat version. But since I created this keto fish taco recipe, we have a new favourite.

Even better, this gluten free and low carb recipe comes together in just 40 minutes.

Let’s take a look at the ingredients:

ingredients for salmon fish tacos

How to make gluten free keto fish tacos


Regular fish tacos are normally made with white fish that is deep-fried in a batter.

I chose salmon instead, which I marinated in olive oil, lime, chili powder and lime juice (plus a few other spices!). By roasting it in the oven, the edges become lovely and crisp, while the interior remains soft and flakey.

marinated salmon fillets

Of course, you could use any firm white fish here as well, such as flounder or cod.

And if you insist that real fish tacos must contain battered fish, use the batter from my Crispy Baked Keto Zucchini Fries! It is a gluten free and super crispy batter which I have used for fish many times.

Low Carb Tacos

Apart for the fish batter, the tacos are the other part that need to be changed to make low carb fish tacos. Regular tacos are made from corn flour, which is high in carbs.

I used my keto tortillas. They are really simple to make, gluten free and nut free – you simply fry them in a pan over medium heat.

Plus, they are just 1.5g net carbs per tortilla.

The recipe is made with coconut flour, but if you prefer almond flour, simply use 3x the amount and you’re golden.

a fried tortilla in a frying pan

Another option are my Crispy Low Carb Keto Taco Shells!

These are fathead tacos made with mozzarella dough and just 1.1g net carbs per taco.

The recipe contains mozzarella cheese, coconut flour and psyllium husk powder. They have a crispy texture that is similar to real corn tortillas.

Normally, fathead dough recipes call for the mozzarella to be melted. This is messy and people often end up giving up.

But I have a method where that’s not necessary. It’s so simple – go check it out!

A finished Keto taco shell held up by a hand

The third option for tacos is using lettuce leaves. Romaine or butter lettuce works well.

This reduces the carbs and calories down even further. Option to serve with cauliflower rice for a bit of bulk!


I like my keto fish tacos with slaw! I used shredded red cabbage and white cabbage, plus fresh cilantro (that’s coriander), scallions (that’s spring onions) and also cubed avocado.

Use a mandolin slicer for extra thin slices. Otherwise, a grater will do.

sliced cabbage and parsley in a bowl


Everyone knows that it’s the salsa that makes a taco!

I can’t wait for you to taste my very delicious cilantro jalapeño yoghurt salsa. I used Greek yoghurt, but if you’re dairy free, coconut yoghurt is a good alternative.

It is out of this world tasty.

You may also choose to add a classic pico de Gallo salsa like this, with tomatoes, onion, jalapeño, garlic, lime and cilantro. In that case, make a guacamole as well, and top with a spoonful of sour cream.

creamy salad dressing in a bowl

Can you meal prep this dish?

In parts, yes. You can prepare the coconut flour tortillas the day before and store them in the fridge. It’s also possible to prepare the salsa the day before.

The fish needs to marinate for at least 20 minutes before cooking. Option to leave it on the marinade overnight.

The vegetables are best fresh.

hand holding a fish taco


Once the salmon is cooked, it can be stored in the fridge for 1 day. It would probably last 2 days, but I always tend to be careful with fish.

It’s possible to freeze both the salmon and the tortillas for up to 3 months. Freeze separately.

More Keto Mexican recipes

My selection of fish and seafood recipes is tiny – in fact, the only dish I can think of is this keto fish pie! However, I have a good number of Mexican-inspired dishes on the website. Here is a selection:

Tried this recipe? Give it a star rating below!

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tacos willed with salmon chunks, avocado and greens

Low Carb Keto Fish Tacos

from Sugar Free Londoner

Low carb fish tacos are my new weekday dinner fave! These keto fish tacos are so delicious you’ll want to put them on your regular rotation.

Prep Time 15 mins

Cook Time 30 mins

Total Time 45 mins

Course Main Course

Cuisine Mexican

Servings 3 servings (2 tacos per person)

Calories 431 kcal

Note: The servings slider only changes the first amount in each line and not any subsequent amounts. Please make your own calculations where necessary. ***As an Amazon Associate I earn from qualifying purchases.

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  • Preheat the oven to 200C / 180C fan / 400F. Mix the marinade for the salmon together in a small bowl.

  • Place the salmon on a baking tray lined with greaseproof paper, skin side up. Add the marinade all over. (Option for extra flavour: place salmon and marinade in ziplock bag and leave in the fridge overnight.)

  • Bake the salmon for 10 – 15 minutes until cooked through.

Slaw and Salsa Dressing

  • Add dressing ingredients together in a bowl. Blitz with hand blender until smooth. Option to finely chop coriander and jalapeños if you prefer and stir everything together.

  • Mix shredded cabbages, spring onion and coriander together in a mixing bowl.

  • Mix dressing through slaw to fully coat.


  • Remove the skin from the salmon and flake into chunks.

  • Place taco on a flat surface. Fill with slaw, avocado and salmon. Serve any leftover slaw on the side.


Net carbs: 6.8g without tortillas plus 1.5g net carbs per tortilla = 9.8g net carbs per portion.  Makes 6 fish tacos. 2 tacos per person = 3 portions.  (Nutrition calculated without tortillas. I included all ingredients for the marinade in the nutrition calculation. This means the total net carb count will be a little less since the marinade is not actually consumed in full.)  *** Option to use  Crispy Low Carb Keto Taco Shells or lettuce leaves instead of the tortillas.  Best served fresh. Option to prepare the tortillas / taco shells the day before. 


Calories: 431kcalTotal Carbohydrates: 12.4gProtein: 30.8gFat: 29.6gSaturated Fat: 5.3gFiber: 5.6gSugar: 4g

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