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Fish/ Lunch/ Potato

The Best Tuna Baked Potato

June 11, 2021 (Last Updated: February 15, 2023) by Chris Collins

Here I’ll show you how to make a simple Tuna Baked Potato in the most delicious way possible!

A tuna jacket potato is a classic, at least here in the UK anyway. I’ve been eating these beauties since lunchtime at school! Yes, depressingly school was a long time ago 🥺. Anywho, if you love a good tuna spud I’ve got some awesome tips and tricks to making it ultra delicious. Follow me…

two tuna jacket potatoes on large wooden board garnished with chives

Baked Potato

Step away from the microwave 🤪 No really, c’mon. We both know the difference between a microwaved and baked potato is huge! You can’t beat that crispy, salty skin with that light fluffy centre. And if you want both those things it’s gotta go in the oven.

Jacket Potato vs Baked Potato

Just a quick note, because I’ll probably be using them interchangeably throughout this post, they’re both the same thing. We call baked potatoes ‘jacket’ potatoes here in the UK!

What are the best potatoes for baking?

You want a big floury baking potatoes like Russets (US) or Maris Pipers (UK). The high starch content and thick skin gives you a nice fluffy centre and crispy skin.

To bake the potatoes you’ll want to stab them (so the moisture can escape), salt them (to draw out the moisture and season the skin) and oil them (to help the skin crisp up).

Process shots: stab potatoes (photo 1), cover in salt and olive oil (photo 2), rub into the skin (photo 3), bake in the oven (photo 4).

4 step by step photos showing how to bake a potato

Tuna Mayonnaise

Typically yes, you’d just mix together tuna and mayonnaise then plonk on a baked potato. BUT, me being me and this blog being this blog, you know we’re gonna crank it up a notch 😛

Tuna Mayonnaise Ingredients

  • Tuna – Canned tuna chunks in brine or oil works well here. I find flaked tuna sometimes turns mushy.
  • Mayo – Full fat mayonnaise of course.
  • Dijon Mustard – Adds a very gentle kick of heat and flavours the tuna beautifully.
  • Chives – These add a nice burst of flavour. Some recipes use spring or red onion, but I prefer the more subtle flavour of chives.
  • Lemon Juice – Lemon and fish is a glorious combo, and tuna is no exception.
  • Chilli Flakes – Tuna takes on spice really nicely, so just a pinch of chilli flakes will do the job.
  • Salt & Pepper – Go easy with the salt if the tuna was in brine, but a good amount of black pepper is encouraged!
  • Feta – This is to crumble over at the end.

Can I make the tuna mayo ahead of time?

You can, just tightly store in the fridge until needed. You will find it becomes watery as it rests, but just give it a stir before serving (and a dollop of mayo if needed).

Process shots: gather ingredients (photo 1), add to mixing bowl (photo 2), stir to combine (photo 3).

3 step by step photos showing how to make tuna mayo

Baked Potato Side Salad

This is totally optional, but sometimes I’ll serve a side salad with these jacket potatoes. It’s incredibly simple and compliments the tuna mayo nicely. Feel free to switch up and sub as you fancy!

Can I make the salad ahead of time?

I tend to make this no longer than a couple of hours ahead of time, just because it turns watery and the avocado browns. Not a deal breaker though as it’s not the main event! Just tightly cover in the fridge overnight if needed.

Process shots: gather ingredients (photo 1), add to a mixing bowl (photo 2), stir to combine (photo 3).

3 step by step photos showing how to make tomato avocado cucumber salad

Tuna Mayo Jacket Potato

Alrighty, potato is baked and tuna is mixed, let’s stick the two darn things together shall we?!

Butter & Salt

Once you’ve sliced open the spud, ensure you add a dollop of butter and a good pinch of salt. There’s nothing worse than a yummy tuna mayonnaise on top of a bland as heck potato!!

Process shots: slice open potato (photo 1), add butter and salt (photo 2), use a fork to fluff up and mix in salt/butter (photo 3), top with tuna mayo (photo 4).

4 step photos showing how to make tuna baked potato

Serving a Tuna Baked Potato

I love topping with crumbled feta, because tuna and cheese is one of the most underrated combos ever! You can sub cheddar if that’s what you have.

For more tuna recipes check out my Tuna Pasta Salad, Tuna Melt Bagels and Tuna Fish Cakes!

For more baked potatoes recipes check out my Jalapeno Popper Loaded Potatoes, Jacket Potato with Cheese & Beans and Cheesy Broccoli Baked Potatoes!

Alrighty, let’s tuck into the full recipe for this tuna baked potato shall we?!

tuna baked potato on white plate with silver fork digging in next to side salad

How to make Tuna Baked Potato (Full Recipe & Video)

tuna baked potato on white plate with silver fork digging in next to side salad

The Best Tuna Baked Potato

Here I'll show you how to make a simple Tuna Baked Potato in the most delicious way possible! This recipe will work with 2 large potatoes or 3 medium. Both tuna and salad will serve 2 large portions or 3 smaller.
5 from 2 votes
Print Pin Rate
Servings (click & slide): 2
Course: Lunch
Cuisine: British
Prep Time: 15 minutes
Cook Time: 1 hour 30 minutes
Total Time: 1 hour 45 minutes
Calories per serving: 856kcal
Cost per serving: £4 / $5


  • Baking Tray
  • 2 Medium Sized Mixing Bowls & Spatula
  • Sharp Knife & Chopping Board

Ingredients (check list):

Baked Potatoes

  • 2 large or 3 medium Baking Potatoes (see notes)
  • 2-3 tbsp Butter
  • drizzle of Olive Oil,
  • Salt, as needed

Tuna Mayo

  • 2x 5oz/145g cans of Tuna Chunks, drained
  • 1/3 cup / 80g Mayonnaise
  • 2 tbsp finely diced Fresh Chives
  • 2 tsp Fresh Lemon Juice
  • 1 tsp Dijon Mustard
  • 1/4 tsp EACH: Salt, Black Pepper, Chilli Flakes (or to taste)
  • 1/2 cup / 60g crumbled Feta, to top (can sub grated Cheddar)

Side Salad (optional)

  • 1/2 Cucumber, quartered & sliced
  • 1 Avocado, diced
  • 1 cup Cherry Tomatoes, quartered (can sub other tomatoes)
  • 1/2 small Red Onion, finely sliced
  • 1 tbsp finely diced Fresh Dill
  • 1 tbsp EACH: Extra Virgin Olive Oil, Lemon Juice (or more to taste)
  • Salt & Black Pepper, to taste


  • Baked Potato: Place the potatoes on a baking tray and stab a few times all over. Coat in a drizzle of olive oil and a good pinch of salt. Bake uninterrupted for 80 mins at 350F/180C, or until fork tender, then crank up the heat to 430F/220C for 10mins or until ultra crispy. 
  • Tuna Mayo: In a medium sized mixing bowl combine drained tuna with mayo, dijon, lemon juice, chives, salt, pepper and chilli flakes. Cover in the fridge until needed and give it a quick stir before serving.
  • Salad (optional): In a medium sized mixing bowl combine cucumber, tomato, avocado, red onion, dill, extra virgin olive oil, lemon juice and a good pinch of salt and pepper. Cover in the fridge until needed and give it a quick stir before serving.
  • Tuna Baked Potato: Slice through the centre of the potatoes, then use a tea towel to wrap around the bottom and gently squeeze the potato open with your hands. Add butter and salt to the centre, then use a fork to mix into the potato. Top with tuna mayo, then crumble over feta and serve up!

Quick 1 min demo!


a) Baked Potatoes - If you're after more tips and tricks on making the perfect baked potatoes then check out my Best Baked Potatoes!
b) Serving Size - The tuna will stretch to either two very large potatoes (and 2 hungry people) or 3 medium sized potatoes. The salad will also serve 2-3.
c) Tuna Mayo - You can make this ahead of time, but it does turn watery the longer it rests. Tightly cover in the fridge for 2-3days, just add a dollop of mayo and stir before serving. 
d) Side Salad - You can really customize this as you fancy, it's just a quick bonus recipe I thought I'd throw in. Corn works nicely added, you can sub the lemon juice for other vinegar like red wine, apple cider or balsamic. I love using dill because it goes so well with the cucumber, but also with the tuna, but feel free to sub your favourite fresh herb (parsley, basil or coriander/cilantro works well). I tend to make this fresh (or around 1 hour in advance) because the longer you leave it the more watery it becomes and the more the avocado will soften and brown. 
e) Calories - based on two large potatoes (so two servings) without the side salad. Calories for 1 serving assuming 2 tsp olive oil for baking potatoes.

Your Private Notes:


Nutrition Facts
The Best Tuna Baked Potato
Amount Per Serving
Calories 856 Calories from Fat 444
% Daily Value*
Fat 49.37g76%
Saturated Fat 15.685g78%
Trans Fat 0.073g
Polyunsaturated Fat 17.777g
Monounsaturated Fat 13.585g
Cholesterol 117mg39%
Sodium 1362mg57%
Potassium 1957mg56%
Carbohydrates 60.94g20%
Fiber 5.6g22%
Sugar 6.22g7%
Protein 42.39g85%
Vitamin A 669IU13%
Vitamin C 41.4mg50%
Calcium 252mg25%
Iron 5.13mg29%
* Percent Daily Values are based on a 2000 calorie diet.
Nutrition is based on the absence of salt unless stated as a measurement in the ingredients. Cost is worked out based on ingredients bought from UK supermarkets, then divided by the number of servings. In both instances these values are just for guidance. Please check out my FAQ Page for more info.
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Looking for more?You'll find plenty more delicious comfort food like this in my Debut Cookbook 'Comfy'

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Recipe Rating


  • Reply
    August 1, 2023 at 12:02 pm

    5 stars
    So good!
    The last time I had something like this before making it myself was when I was about 6 and in the UK. I had it in this small garden venue next to a huge river and have been thinking about it since. 16 now, back home in Australia and this recipe took me right back to that small garden venue.
    Thanks for sharing!

    • Reply
      Chris Collins
      August 1, 2023 at 3:03 pm

      Miya, this is so lovely to read! Thank you so much for the review 🙂 C.

  • Reply
    June 12, 2021 at 2:07 pm

    5 stars
    So delicious!