Delia Smith Jacket Potatoes Recipe

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These classic jacket potatoes are everything you want from a proper British baked spud: shatteringly crisp skins with a fluffy, steaming interior that begs for butter and a good pinch of salt. This is an easy, dependable recipe with very little hands-on work, but it rewards you with that unmistakable oven-baked flavour. Expect a total time of about 1 hour 40 minutes, most of it unattended while the oven does the heavy lifting. If you have ever ended up with tough skins or a dense middle, this method will sort it.

Table of Contents

Ingredients

For the jacket potatoes

4 large floury baking potatoes (about 300g each), such as Maris Piper or King Edward
2 teaspoons olive oil (or any neutral oil)
1 1/2 teaspoons sea salt flakes (plus more to taste)
Freshly ground black pepper, to taste

For a classic butter and cheddar topping

40g unsalted butter (about 10g per potato)
100g mature cheddar, freshly grated

Optional toppings (choose your favourites)

Sour cream (about 1 tablespoon per potato)
Chives or spring onions, finely chopped
Baked beans, warmed through
Tuna mayo
Crispy bacon and a little extra cheese

How to Make Delia Smith Jacket Potatoes

Prepare the oven

Prepare the oven: Preheat the oven to 220°C (or 200°C fan). Place a shelf in the middle of the oven and bake the potatoes directly on the oven rack so hot air can circulate all around.

Prep the potatoes

Scrub and dry: Scrub the potatoes under cold water, then dry them very well with a tea towel. Dry skins crisp up properly.
Prick and season: Prick each potato a few times with a fork (this helps steam escape). Rub each potato with a little oil, then sprinkle all over with sea salt.

Bake until fluffy and crisp

Bake: Place the potatoes straight on the middle rack (pop a tray on the shelf below if you want to catch any drips). Bake for 1 hour 15 minutes to 1 hour 35 minutes, depending on size.
Check for doneness: They are ready when the skins feel crisp and the potatoes give slightly when squeezed (use an oven glove). A skewer should slide in easily with no resistance.

Cool briefly, then split and fluff

Rest: Remove the potatoes from the oven and leave for 5 minutes. This short rest helps the steam settle so the insides fluff up rather than turning gluey.
Split and fluff: Cut a deep cross into the top of each potato. Push the ends towards the centre to open them up, then fluff the inside with a fork.

Assemble and serve

Butter first: Add the butter while the potato is piping hot so it melts into the fluffy centre. Season with black pepper and a pinch more salt if needed.
Add toppings: Sprinkle over cheddar and let it melt naturally, or return the potatoes to the oven for 2 to 3 minutes for a more molten finish. Add sour cream and chives if using, then serve straight away.

Tips for the Best Jacket Potatoes

Why aren’t my jacket potato skins crispy?

Two culprits are almost always to blame: the potatoes were not dried properly after washing, or they were baked on a tray. Dry them thoroughly and bake directly on the oven rack. Also, skip foil because it traps steam and softens the skin.

How do I make sure the middle turns fluffy, not dense?

Use a floury variety (Maris Piper, King Edward, or similar) and bake long enough. If they are underbaked, the centre stays firm and slightly waxy. Resting for 5 minutes, then fluffing with a fork also makes a big difference.

Should I prick the potatoes before baking?

Yes. A few fork pricks allow steam to escape and help prevent the skin splitting. You do not need dozens, just a few on each side.

How can I get extra-crisp skins for a pub-style finish?

Once baked, split the potatoes and return them to the oven for 5 minutes with the insides exposed. Then add butter and toppings. This quick blast drives off excess steam and crisps the skin even more.

Serving Suggestions

Serve with a simple green salad and a sharp vinaigrette.
Add baked beans and extra cheddar for a cosy supper.
Top with tuna mayo and sweetcorn for a classic lunch.
Pair with chilli con carne and a spoonful of sour cream.

Storage

Room temperature

Let baked potatoes cool for no more than 2 hours at room temperature before storing. After that, refrigerate for food safety.

Refrigerator

Store cooled jacket potatoes in an airtight container for up to 3 days. Reheat on a rack at 200°C (180°C fan) for 15 to 25 minutes until piping hot and the skin re-crisps. Microwaving works in a pinch, but the skin will soften.

Freezing

Freeze plain baked potatoes (best without dairy toppings) for up to 2 months. Cool completely, wrap individually, then freeze. Thaw overnight in the fridge and reheat in a hot oven until fully heated through.

Nutrition

Calories: 410 kcal
Carbohydrates: 55 g
Protein: 13 g
Fat: 14 g
Saturated fat: 8 g
Sodium: 450 mg

Nutrition values are estimates and will vary depending on potato size and the toppings you choose.

FAQs

How long should jacket potatoes bake in the oven?

For large floury potatoes (around 300g each), bake at 220°C (200°C fan) for 1 hour 15 minutes to 1 hour 35 minutes. They are done when the skin is crisp and a skewer slides into the centre easily.

Should I wrap jacket potatoes in foil?

No. Foil traps steam and gives you soft, steamed skins. For a proper jacket potato with crisp skin, bake the potatoes uncovered directly on the oven rack.

What are the best potatoes for jacket potatoes in the UK?

Choose floury potatoes like Maris Piper or King Edward. They bake up light and fluffy inside, whereas waxy varieties tend to stay firm and dense.

How do I reheat jacket potatoes and keep them crispy?

Reheat in a hot oven, ideally 200°C (180°C fan), placed directly on the rack for 15 to 25 minutes. This warms the centre and re-crisps the skin far better than a microwave.

Why is my baked potato still hard in the middle?

It is simply underbaked, or the potato was very large. Keep baking until a skewer goes through with no resistance. If the skin is getting dark, lower the oven slightly and continue until fully soft inside.

Can I bake jacket potatoes ahead of time?

Yes. Bake until fully done, cool, then refrigerate for up to 3 days. Reheat in a hot oven on a rack to bring back the crisp skin, then add toppings just before serving.