A jacket potato is one of the cheapest, most satisfying things you can put on a plate, and almost everyone makes them slightly wrong. The skin should crackle and give a little salty crunch, the inside should be dry and fluffy rather than damp and dense, and the whole thing should be hot enough to melt cheese on contact. This page is about getting that right, and then loading it with tuna, cheese and beans.
The result tastes exactly like it should: savoury, comforting, a bit nostalgic. It is very easy but not fast — a proper jacket potato needs about 90 minutes in the oven and there is no honest way round it, though there is a decent hybrid method in the notes. This is our home version of the Tuna, Cheese and Beans spud from the SpudMad range at The Cozy Bowl.
Why This Recipe Works
- The potato goes straight onto the oven shelf, not on a tray. Hot air needs to circulate all the way round. On a tray, the underside steams in its own moisture and stays leathery.
- Oil and salt rubbed into the skin. The oil conducts heat into the surface and the salt draws out moisture, which is exactly what makes a skin crisp rather than tough. It takes fifteen seconds and transforms the result.
- No foil, ever. Foil traps steam and gives you a soft, pale, slightly wet skin. It is the single most common jacket potato mistake.
- Pricked, not scored. A few fork holes let steam escape so the inside dries out and goes fluffy. Deep cuts let too much moisture out and the potato collapses.
- The potato is cut open the moment it comes out. Steam escapes immediately, so the flesh stays fluffy. Left whole for ten minutes, that steam condenses back into the potato and makes it claggy.
- Butter goes in before anything else. Forked into the hot flesh with a little salt and pepper, it seasons the potato itself. Toppings sit on top of a seasoned base rather than on bland potato.
Ingredient Notes
Potatoes. This matters more than anything else. You want a large floury baking potato — Maris Piper, King Edward, or anything sold specifically as a baking potato. Around 300 to 350 g each. Waxy varieties like Charlotte or Anya will never go fluffy no matter how long you bake them, because they simply do not have the starch structure.
Oil. Any neutral oil, or olive oil. Half a teaspoon per potato rubbed all over.
Flaky sea salt. Rub it into the oiled skin. Fine salt works but flakes give better texture and stick better.
Tuna. Tinned tuna in spring water rather than oil, drained really thoroughly — press it against the side of the tin with a fork. Tuna in oil makes the mayonnaise mixture greasy and loose.
Mayonnaise. Full-fat gives the best texture. Mix it with a little lemon juice and black pepper rather than using it neat, which is bland.
Baked beans. Any brand you like. Warm them through in a small pan rather than a microwave so you can reduce them slightly and concentrate the sauce.
Cheddar. Mature cheddar, coarsely grated. Grate it yourself — pre-grated cheese is coated in potato starch or cellulose to stop it clumping, and it melts noticeably worse.
Spring onions and crispy onions. The SpudMad finish. Spring onions for freshness, crispy fried onions for crunch. Both are worth having.
Substitutions and Variations
Sweetcorn in the tuna mix. Three tablespoons of drained sweetcorn stirred into the tuna mayonnaise. A classic addition and it adds sweetness and texture.
Tuna mayo with red onion and capers. Finely diced red onion and a teaspoon of chopped capers turn it into something sharper and more grown-up.
Cheese and beans only. Leave the tuna out entirely. Grate the cheese into the hot potato flesh first so it melts, then spoon the beans over.
Air fryer method. Oil and salt as normal, then air-fry at 200°C for 45 to 55 minutes, turning once. The skin comes out excellent and it uses far less energy than a full oven.
The hybrid shortcut. Microwave the potato on full power for 6 to 8 minutes, then oil, salt and finish in a 220°C oven or air fryer for 20 to 25 minutes. Total time drops to around 30 minutes and the skin is nearly as good.
Other loaded options. Try our creamy chicken loaded potato, rich beef loaded potato, or the frankly ridiculous Thunder Spud with ramen on top.
This recipe as written contains fish and dairy. We have not tested vegetarian, vegan or gluten-free versions, so we cannot describe any variation as suitable for those diets.
Step-by-Step Guidance
The card below has the full method. These are the five details that separate a good jacket potato from a disappointing one.
Preparing the potato
Scrub it under cold water with a brush and then dry it completely with a tea towel. A wet potato steams instead of crisping. Prick it six or eight times with a fork, spread across the whole surface, then rub half a teaspoon of oil all over with your hands and sprinkle generously with flaky salt, pressing it into the skin.
Baking
Oven at 200°C fan, potato straight onto the middle shelf with nothing underneath except perhaps a tray on the shelf below to catch drips. Bake for 75 to 90 minutes depending on size. It is done when a skewer slides all the way through with no resistance at all and the skin has gone crisp and slightly wrinkled. If the skewer meets any firmness in the middle, give it another ten minutes — an under-baked jacket potato is grim, and there is no way to save it once you have opened it.
Opening and seasoning
Take it out and immediately cut a deep cross in the top, then squeeze the sides gently so it opens up and steams. Drop in a good knob of butter, season with salt and pepper, and fork the butter through the flesh so it breaks up and turns fluffy. This is the step almost everyone skips and it makes the biggest difference to the final mouthful.
Loading
Add the grated cheddar next, directly onto the hot buttered flesh so it starts melting. Then the tuna mayonnaise, then the hot beans, then a second scatter of cheese. Finish with spring onions and crispy onions. Building it in this order means the cheese melts properly and the crisp bits stay on top where they belong.
Professional Tips
- Bake two even if you only want one. The oven is on anyway. A cold cooked jacket potato is excellent halved, brushed with oil and fried cut-side down the next day.
- Buy potatoes of a similar size. Wildly different sizes in the same oven means one is under-done and one is dry.
- Use a skewer, not a knife, to test. A knife cuts through resistance and lies to you. A thin skewer tells you the truth.
- Warm the beans in a pan and reduce them slightly. Two minutes of simmering thickens the sauce so it sits on the potato instead of flooding the plate.
- Season the tuna mayonnaise properly. Lemon juice, black pepper and a pinch of salt. Unseasoned tuna mayo is the reason people think jacket potatoes are boring.
- Do not press the potato flat. Fork it gently. Mashing it inside the skin makes it dense.
- Have everything else ready before it comes out. The potato is at its absolute best in the first three minutes.
Troubleshooting
| Problem | Likely cause | Solution | Prevention |
|---|---|---|---|
| Skin soft and leathery | Wrapped in foil, baked on a tray, or potato was wet | Return to a 220°C oven for 10 minutes | Dry the skin, oil and salt it, bake directly on the shelf, never use foil |
| Inside dense and waxy | Wrong variety of potato | None; it cannot be fixed by cooking | Use Maris Piper, King Edward or a labelled baking potato |
| Inside claggy and wet | Left whole after baking so steam condensed back in | Fork it through vigorously with butter | Cut it open the moment it leaves the oven |
| Firm patch in the middle | Under-baked | Wrap loosely and return to the oven for 10 to 15 minutes | Test with a thin skewer, which must slide through with no resistance |
| Potato burst open in the oven | Not pricked, so steam had nowhere to go | Cosmetic only, still fine to eat | Prick 6 to 8 times all over with a fork |
| Cheese not melting | Added after the cold toppings, or potato cooled | Put the loaded potato under a hot grill for 2 minutes | Grate cheese straight onto the hot buttered flesh first |
| Watery tuna mix | Tuna not drained properly, or tuna in oil used | Drain in a sieve and add a little more mayonnaise | Use tuna in spring water and press it dry with a fork |
| Beans flooding the plate | Not reduced | Spoon off the excess sauce | Simmer the beans for 2 minutes to thicken before serving |
Serving Suggestions
A loaded jacket potato is a complete meal and does not really need anything else, but a sharp green salad with a vinegary dressing cuts the richness well. If you are feeding people properly, put out crispy onion rings or a plate of Naga chilli potatoes for double potato duty, which nobody has ever complained about.
To drink, something cold and simple — a fruit bubble soda or a classic lemonade. For pudding, chocolate fudge cake with custard. There are more spuds in our loaded spuds collection.
Storage and Reheating
- Plain baked potatoes. Cool completely, then refrigerate in a sealed container. They reheat well in a 200°C oven for 15 to 20 minutes, or halve them and fry cut-side down in butter, which is genuinely better than the original.
- Loaded potatoes. Do not store loaded. The mayonnaise-based tuna does not reheat, the beans go dry and the crispy onions turn to mush. Keep components separate.
- Tuna mayonnaise. Refrigerate in a sealed container and use within a day. Do not leave it at room temperature.
- Beans. Refrigerate and reheat in a pan with a splash of water.
- Freezing. Baked potato flesh freezes well if you scoop it out, mash it with butter and cheese, and refill the skins — twice-baked potatoes. Bake from frozen at 200°C for 35 to 40 minutes. Do not freeze the tuna mayonnaise.
Follow standard UK food safety guidance: cool leftovers within two hours, refrigerate promptly and reheat until piping hot throughout. Take particular care with cooked potatoes, which should not be left standing at room temperature for long periods. We have not carried out shelf-life testing on this recipe, so use your own judgement.
Frequently Asked Questions
How long does a jacket potato take at 200°C?
For a large 300 to 350 g baking potato, 75 to 90 minutes in a 200°C fan oven. Smaller potatoes around 200 g will be closer to 60 minutes. Always test with a skewer rather than trusting the clock.
Should I wrap it in foil?
No. Foil traps steam and guarantees a soft, pale skin. If crisp skin is not something you care about then it does no harm, but it will never crisp under foil.
Can I microwave a jacket potato?
You can cook it through in 8 to 10 minutes, but the skin will be soft and slightly rubbery. The best compromise is the hybrid method: microwave for 6 to 8 minutes, then oil, salt and finish in a hot oven or air fryer for 20 to 25 minutes.
What is the best potato for jackets?
Maris Piper or King Edward. Both are floury enough to go properly fluffy inside. Anything sold as a baking potato will be a suitable variety.
Why is my potato skin tough rather than crisp?
Usually because it was baked on a tray or wrapped, or because the skin was damp when it went in. Dry it, oil it, salt it and put it straight on the oven shelf.
Do I need to prick the potato?
Yes. It lets steam escape so the inside dries out and goes fluffy, and it stops the occasional dramatic burst in the oven.
Can I bake several at once?
Yes, and it makes far better sense than baking one. Space them out on the shelf so air can circulate, and pick potatoes of similar size so they finish together.
PrintLoaded Jacket Potato with Tuna, Cheese and Beans
- Total Time1 hour 40 minutes
- Yield2 loaded potatoes 1x
A properly crisp-skinned, fluffy baked potato loaded with seasoned tuna mayonnaise, melting mature cheddar, hot baked beans, spring onions and crispy onions. Includes the full method for getting the potato itself right.
Ingredients
For the potatoes
- 2 large floury baking potatoes, Maris Piper or King Edward, about 300 to 350 g each
- 1 tsp vegetable or olive oil
- 1 tsp flaky sea salt
- 30 g salted butter
- Fine sea salt and black pepper
For the tuna mayonnaise
- 1 x 145 g tin tuna in spring water, drained very well
- 3 tbsp full-fat mayonnaise
- 1 tsp lemon juice
- 1/4 tsp black pepper
- Pinch of fine sea salt
- 3 tbsp tinned sweetcorn, drained (optional)
To load
- 1 x 400 g tin baked beans
- 100 g mature cheddar, coarsely grated
- 2 spring onions, thinly sliced
- 2 tbsp crispy fried onions
Instructions
- Heat the oven to 200°C fan (220°C conventional).
- Scrub the potatoes under cold water and dry them completely with a tea towel. A damp skin will not crisp.
- Prick each potato 6 to 8 times all over with a fork. Rub about 1/2 tsp of oil over each one with your hands, then sprinkle generously with flaky sea salt, pressing it into the skin.
- Put the potatoes straight onto the middle oven shelf, with a tray on the shelf below to catch any drips. Do not use foil and do not put them on a tray.
- Bake for 75 to 90 minutes. They are ready when a thin skewer slides all the way through with no resistance and the skin is crisp and slightly wrinkled. If you feel any firmness in the centre, give them another 10 minutes.
- Meanwhile, drain the tuna thoroughly, pressing it against the side of the tin with a fork. Flake it into a bowl and mix with the mayonnaise, lemon juice, black pepper, salt and the sweetcorn if using.
- About 5 minutes before the potatoes are done, tip the beans into a small pan and warm over a medium heat, simmering for 2 minutes so the sauce thickens slightly.
- Take the potatoes out and immediately cut a deep cross in the top of each. Squeeze the sides gently so they open up and release steam.
- Add half the butter to each, season with salt and pepper, and fork it through the flesh so it breaks up and turns fluffy.
- Scatter two thirds of the grated cheddar over the hot flesh so it starts to melt. Spoon over the tuna mayonnaise, then the hot beans.
- Finish with the remaining cheese, the sliced spring onions and the crispy fried onions. Serve immediately.
Notes
The hybrid shortcut: Microwave the pricked potato on full power for 6 to 8 minutes, then oil, salt and finish in a 220°C oven or air fryer for 20 to 25 minutes. Total time drops to around 30 minutes and the skin is nearly as good.
Air fryer: Oil and salt as usual, then air-fry at 200°C for 45 to 55 minutes, turning once. Excellent skin and far less energy than a full oven.
The mistake to avoid: Wrapping the potato in foil, or baking it on a tray. Both trap steam and give a soft, pale, leathery skin. Straight onto the oven shelf, every time.
Make ahead: Bake the potatoes in advance, cool and refrigerate. Reheat at 200°C for 15 to 20 minutes, or halve and fry cut-side down in butter. The tuna mayonnaise can be made a few hours ahead and refrigerated. Do not store a potato once loaded.
Variations: Add diced red onion and chopped capers to the tuna for a sharper mix. Leave the tuna out for a plain cheese and beans spud. See also our creamy chicken, rich beef and Thunder Spud loaded potatoes.
Equipment: A vegetable brush, a fork, a thin metal skewer for testing, a small saucepan and a box grater.
Allergen note: Always check the label of every ingredient you use, as recipes and allergen information can change. People with food allergies or intolerances must also consider cross-contamination.
Take particular care with the tuna (fish), mayonnaise (egg, mustard in some brands), cheddar and butter (milk), baked beans (may contain wheat, celery or sulphites depending on brand) and crispy fried onions (often wheat flour). Allergen information must be confirmed by The Cozy Bowl before it is relied upon.
This is a home recipe inspired by a dish or flavour available at The Cozy Bowl. It is not the restaurant’s exact commercial recipe.
Get the Potato Right and the Rest Follows
Once you can turn out a properly fluffy spud with a crackling skin, every topping in the loaded spuds collection becomes worth making. And if 90 minutes is 90 minutes you do not have, the whole SpudMad range is ready and waiting when you order from The Cozy Bowl on Biscot Road in Luton.