
Vegan alternatives to tuna
Swap matrix
Use these instead
Mashed chickpeas with vegan mayo and a sheet of crumbled nori is the classic tuna-mayo replacement — same texture, same sandwich, no bycatch.
Conversion ratios
| Substitute | Use this much | Good to know |
|---|---|---|
| Chickpeas | 1 tin (240 g drained) = 1 tin tuna | Mash roughly, leave some texture. |
| Nori or dulse flakes | 1 tsp per tin | Supplies the sea flavour. |
| Sunflower seeds | 50 g soaked and pulsed | Adds the flaky, slightly oily bite. |
Best uses
- Sandwiches, jacket potatoes and wraps
- Tuna-style pasta bake
- Salad Niçoise
- Melts on toast with vegan cheese
Why the swap works
The texture pulls apart and bites the same way once cooked and seasoned.
Where it does not work
Over-mashing turns it into hummus. Stop while chunks remain, and add the mayo last.
Kitchen notes
- A spoon of caper brine or pickle juice adds the acidity tinned tuna has.
- Finely diced celery and red onion give the crunch.
- Dulse flakes are milder than nori if the sea flavour is too strong.
The numbers
Swapping one kilo saves about 6.1 kg CO₂e. Do it once a week for a year and you avoid roughly 79 kg CO₂e — the same as driving a petrol car 395 km.
Sources: Poore & Nemecek (Science, 2018), FAO, USDA FoodData Central, Mekonnen & Hoekstra (2011).
Common questions
What can I use instead of tuna in a sandwich?
Roughly mashed chickpeas with vegan mayo, nori flakes, capers and diced celery. It has more fibre and no mercury.
How do I make it taste of the sea?
Crumble half a nori sheet, or use a teaspoon of dulse flakes, plus a splash of caper or olive brine.
Is chickpea tuna high in protein?
Around 7 g per 100 g against 25 g in tinned tuna — add sunflower seeds or serve it on wholemeal bread with a side of beans.
Convert this recipe
Paste an ingredient list and we will rewrite the animal ingredients as vegan ones, with quantities kept as written.
In depth
The longer answer
Tuna’s role in cooking is twofold: it provides a firm, flaky protein structure and a distinct savoury, briny flavour that comes from its natural oils and salt content. A direct plant-based substitute is not obvious because no single vegetable mimics both the texture and the umami-rich taste. The challenge is to replicate the mouthfeel of cooked or canned tuna while delivering a similar savoury punch, which requires a combination of ingredients rather than a one-to-one swap.
The main plant-based options are chickpeas, young jackfruit, and commercial products made from soy or pea protein. Chickpeas mash into a flaky, firm texture but lack brininess; jackfruit shreds to resemble tuna flakes but needs seasoning. Commercial alternatives often include seaweed for ocean flavour and oils for richness. Price-wise, homemade versions are cheaper, while store-bought can cost more than canned tuna. Environmentally, all plant-based options have a significantly lower carbon and water footprint than wild-caught or farmed tuna.
To make a convincing tuna substitute, start with canned chickpeas or young jackfruit, mash or shred them, then season generously with nori flakes, soy sauce, lemon juice, and a touch of olive oil. For a creamy tuna salad, add vegan mayonnaise and diced celery. The result works well in sandwiches, salads, or on crackers, but it will not fool anyone expecting raw tuna in sushi. Accept that the texture is softer and the flavour is milder; the trade-off is a lighter, more sustainable meal.
At a glance
Quick facts
| Detail | What to know |
|---|---|
| Key texture source | Chickpeas or jackfruit |
| Umami boost | Nori, soy sauce, miso |
| Fat replacement | Olive or avocado oil |
| Carbon footprint | 80-90% lower than tuna |
| Common binder | Vegan mayonnaise |
In practice
What this means for you
- Mash chickpeas with a fork for a flaky, tuna-like texture.
- Add crumbled nori sheet for authentic ocean flavour.
- Use a splash of lemon juice to brighten the taste.
- Chill the mixture for 30 minutes to let flavours meld.
- Serve in a sandwich with lettuce and tomato for crunch.
FAQ
Common questions
Can I use this in sushi rolls?
What is the best store-bought vegan tuna?
How do I get a stronger fishy taste?
Is this cheaper than real tuna?
Newsletter
One short letter. Once a month.
A handful of recipes, a story worth your time, and one thing you can do this week. Nothing else.
We never share your email. Unsubscribe in one click.