Quick Answer
Wrap it in foil and either simmer it gently for about 45 minutes or bake it in a dish of water for about 75 minutes, as the pack says. Times vary by brand and size, so follow your pack. The centre must be piping hot all the way through, and the casing and clips come off before anyone eats it.
Key Takeaways
- The pack beats any general guide. Two of the best-known brands we checked give different oven temperatures and different microwave times for the same job.
- Supermarket haggis is usually in an inedible casing. Cut it open for the ceremony, then spoon out the filling, and do not eat the casing or the metal clips.
- Haggis is a cook-once food. The packs we found say do not reheat, so cook only what you will eat and plan the neeps and tatties around it.
How do I cook a haggis? Check the pack, then pick a method
How do I cook a haggis for Burns Night without drying it out or serving it lukewarm? Start by reading the pack, because a shop-bought haggis is not all the same product. One Simon Howie listing says it is a raw product that must be fully cooked. A Macsween listing says it needs heating until piping hot. Both say to remove the casing and clips before serving.
The rest of this guide covers the two classic methods, boiling and baking, then the shortcuts: microwave, slices in a pan, air fryer and slow cooker. After that come the neeps and tatties, how to say the Address to a Haggis and what to drink.
What is in a haggis
Traditionally, haggis is made from a sheep’s pluck, meaning the heart, liver and lungs, minced with onion, oatmeal, suet, spices and salt, and moistened with stock. Wikipedia notes that it was traditionally cooked in the animal’s stomach, and that artificial casings are now common, especially in cheaper supermarket brands.
Shop-bought versions vary. The ingredient lists we read online are not all sheep. A Macsween listing at Waitrose gives pork lungs, beef fat, oats, lamb lungs and pork heart. A Simon Howie listing gives pork lungs, oatmeal, beef fat, beef liver, lamb lungs, beef heart, onion, pearl barley, salt and spices. Both contain oats, and the Simon Howie product also contains barley, which matters for anyone avoiding gluten. Vegetarian and gluten-free versions exist, but they have their own packs and instructions, so follow those.
Boiling versus baking: how long does each take?
Both methods start with the haggis wrapped in foil. Here is what the pack wording we found says for three common products. We read the listings online, not the physical packs, so check yours.
| Method | Simon Howie Original (Tesco, Morrisons listings) | Macsween 400g (Sainsbury’s, Waitrose listings) |
| Boil | Wrap tightly in foil, keep the casing and clips on, cover with boiling water, bring to a bubbling boil, then simmer gently for 45 minutes | No boiling instructions on the listing |
| Oven | 190°C (170°C fan), Gas Mark 5, foil-wrapped in a covered ovenproof dish with boiling water halfway up, 75 minutes | 180°C (160°C fan), Gas Mark 4, foil-wrapped in an ovenproof dish with about 2cm of water, 75 minutes |
| Microwave | Cut into chunks, cover with pierced clingfilm, 800W for 3 minutes, break up, then 2 more minutes | Cut into pieces, medium power, 9 minutes (Sainsbury’s) or 10 minutes (Waitrose), stirring |
How long to boil haggis
For a Simon Howie haggis, the listings say wrap it tightly in foil with the casing and clips as found, put it in a large pan of boiling water that just covers it, bring it to a bubbling boil, then simmer gently for 45 minutes, topping up with boiling water if needed. Take it out, remove the foil and slice open the casing to serve. Thermapen, a thermometer retailer, gives the same advice: wrap in tin foil and simmer gently for around 45 minutes.
Gentle is the word that matters. A hard, rolling boil is not what the packs describe.
How to cook haggis in the oven: baked haggis temperature Celsius
Baking is the easier method for a table of guests, because it needs no pan of boiling water on the hob. The baked haggis temperature Celsius depends on the brand: 190°C (170°C fan) on the Simon Howie listing, 180°C (160°C fan) on the Macsween one. Both give 75 minutes. Cooking haggis in foil wrapper keeps the filling moist, and the water in the dish does the same job, so check it halfway and top it up if needed, as Simon Howie advises.
Take the foil off at the end. The casing and clips come off before serving, and the Simon Howie advice is to slice open the casing to serve.
How to cook a haggis in the microwave
Microwave haggis instructions are different, because here the casing and clips come off first. Cut the haggis into pieces in a microwave-safe dish. For Simon Howie, cover with clingfilm, pierce it, and heat at 800W for 3 minutes. Carefully peel back the film, because steam is released, break the haggis up with a fork, re-cover it and heat for a further 2 minutes. Macsween’s listing says to cover, heat on medium and stir, for 9 minutes on one retailer’s page and 10 minutes on another, so read the box. Both say microwaves vary and to adjust the times.
It is quick, but you lose the whole-haggis moment on the table. If you want the ceremony, bake or boil.
How to cook haggis slices in a pan
Pan-frying haggis slices is for breakfast and for people cooking for one or two. The Simon Howie sliced haggis listing at Morrisons gives these options, all from chilled:
- Shallow fry: a little oil in a pan over medium heat, roughly 6 to 8 minutes, turning several times.
- Grill: moderate heat, about 10cm from the heat source, roughly 6 to 8 minutes, turning occasionally.
- Air fryer: 180°C for 6 minutes, flipping the slices halfway through.
- Microwave: pierced clingfilm, 800W for 2 minutes, then stand for 1 minute.
The same listing says it is a raw product that must be fully cooked and piping hot before serving. Waitrose, in a recipe, makes haggis bon bons by removing the casing, rolling the haggis into small balls, coating them in paprika-seasoned flour, egg and breadcrumbs and frying them in oil at 170°C until crisp. That is a starter idea, not a replacement for the pack.
How to cook haggis in a slow cooker
We did not find a haggis maker or a UK food body that recommends a slow cooker. One community recipe on a US slow cooker site wraps the haggis in foil on foil balls and cooks it on low for 6 hours, without added water. We have not tested it, and the long low heat is a reason to check the centre with a thermometer. For a Burns Night supper, the oven is the safer choice.
The traditional way to cook haggis
The traditional way to cook a haggis is to boil or bake it whole in its casing. Butcher Simon Howie, interviewed by the National Farmers’ Union Scotland, prefers it wrapped in tinfoil and put into a tray of water in the oven for about an hour and a half. He adds that there are several ways to cook it and to follow the packet, since instructions vary by make. That makes the traditional haggis recipe cooking time about 90 minutes for his method, against 75 minutes on the pack listings above. Go by the pack and by the thermometer. Wikipedia says haggis can be boiled, baked or deep-fried.
How do you know when haggis is cooked through?
The packs say piping hot all the way through. A thermometer turns that into a number. The Food Standards Agency (FSA) says on its gov.uk guidance for food businesses that the standard advice is a core temperature of 70°C for 2 minutes, with other accepted combinations such as 75°C for 30 seconds, and to check food is steaming hot all the way through before serving. Thermapen’s haggis advice is 75°C held for at least 30 seconds, with a fresh piece of foil over the probe hole afterwards to keep the water out.
That is haggis internal temperature done, in practice: probe the centre, not the edge. If it has not reached temperature, put it back and check again. Those FSA figures are written for businesses, and the haggis packs are the consumer instruction, so use the thermometer as a back-up to the pack, not instead of it.
Can you cook haggis from frozen?
The packs we found say to defrost first. The Macsween listing says defrost first if frozen. The Simon Howie listings say defrost thoroughly in a refrigerator before use and eat within 24 hours. We found no pack that gives cooking times from frozen, so we do not recommend it.
If you plan to freeze one, the packs say to do it on the day of purchase. Simon Howie says to use it within one month, and the Macsween listing says six months. If you buy a haggis frozen, the Macsween listing says once defrosted do not refreeze. For general rules on cooking from frozen, see our guide to cooking chicken from frozen.
Reheating haggis guidelines: what the packs say
The listings we read say do not reheat. The Macsween listing says “Do not reheat”, and so does the Simon Howie sliced haggis listing. Once opened, the Simon Howie listings say to use it within 2 days and not to go beyond the use-by date.
The FSA’s general advice is that food can only be reheated once and must be steaming hot all the way through. Reheating means cooking food again, not just warming it. Our advice, which is our interpretation and not a rule, is to cook only what you need. If you do have leftover cooked haggis, cool it quickly, chill it and check the pack before deciding.
Neeps and tatties: how to serve haggis sides
Neeps and tatties are mashed swede and mashed potato, boiled and mashed separately. The Wikipedia entry on Burns suppers describes them as mashed potatoes (tatties) and mashed swede turnip (neeps). In Scotland the swede is often called a turnip, so check the label in the shop.
Thermapen’s Burns Night recipe gives a clear method:
- Peel and quarter the potatoes. Dice the turnips (and a carrot, if you want one in the mash).
- Simmer each in salted water, in separate pans, for 20 to 25 minutes until soft.
- Drain and leave them in their pans for a few minutes so the moisture evaporates, then mash.
- Warm the milk with half the butter and stir it into the potatoes. Stir the rest of the butter into the turnips, keeping some texture.
The potatoes and the swede take about as long as the haggis in the oven, so start the veg while it rests. If you want a sauce, the Waitrose haggis recipe pairs bon bons with a whisky sauce of mayonnaise, wholegrain mustard and whisky. For a hot sauce, see our guide to thickening a sauce or stew without lumps.
A full Burns supper adds more. The Wikipedia order of events starts with a soup such as Scotch broth or cock-a-leekie, and ends with cranachan or tipsy laird, then oatcakes and cheese.
The Address to a Haggis
Burns suppers are held on or near 25 January, the poet’s birthday. In the usual order of events, the haggis is carried in on a large dish, led by a piper. The host or a guest recites Robert Burns’s poem “Address to a Haggis”, draws a knife at the right moment and cuts the haggis open from end to end. At the end of the poem there is a whisky toast, and then everyone sits down to eat. The National Trust for Scotland says the poem is usually recited by the host as the haggis is carved open.
Burns died in 1796, so the poem is in the public domain, but we only quote the opening: “Fair fa’ your honest, sonsie face, / Great chieftain o’ the puddin-race!” In plain English, that is a greeting to a good-natured, hearty face and the leader of the sausage family. The knife line, “His knife see rustic Labour dight”, is where the host picks up the blade.
A practical tip for shop-bought haggis: the casing on most is an inedible synthetic one, as the Simon Howie listing states, so do the knife work on the casing, then lift the filling out with a spoon. Do not serve the casing or the metal clips.
Whisky and other pairings
Haggis is traditionally served with a dram, meaning a glass of whisky. There is no single correct choice, and the advice we found comes from producers, so treat it as opinion. In The Scotsman, Kingsbarns’ Peter Holroyd suggests a rich, sherried whisky that can stand up to the spices, and says you either go for contrast or for something similar to the food. A former Glenfiddich brand ambassador recommends a sweet and spicy whisky to cut through the richness. Glen Scotia suggests a smoky one, and Loch Lomond suggests orchard-fruit notes to match the pepper, with a blended malt and soda or ginger beer for newcomers.
For a non-drinker, the same logic applies: something sharp or spiced, such as ginger beer, would cut through a rich plate. That is our suggestion, not a published pairing.
Frequently Asked Questions
How do you cook a haggis and serve it for Burns Night?
Wrap it in foil, then simmer it for about 45 minutes or bake it for about 75, following your pack. Check it is piping hot throughout, remove the casing and clips, and serve it with neeps and tatties. A dram of whisky is traditional.
How long to boil haggis?
For a Simon Howie haggis, the listings say simmer it gently for 45 minutes in a pan of water that just covers it, foil-wrapped with the casing and clips on. Top up with boiling water if needed. Always check the pack for your brand and weight.
How do you know when haggis is cooked through?
The pack says piping hot all the way through. A probe thermometer in the centre is the surest check. The FSA’s business guidance gives 70°C for 2 minutes as standard, and Thermapen suggests 75°C for 30 seconds. If it falls short, put it back.
Can you cook haggis from frozen?
The packs we found say to defrost first, in the fridge, and eat within 24 hours of defrosting. We found no brand that gives times from frozen, so we do not recommend it. Freezing a fresh haggis on the day of purchase is allowed.
How to cook a haggis in the microwave?
Remove the casing and clips and cut the haggis into pieces. For one Simon Howie product, cover it with pierced clingfilm and heat at 800W for 3 minutes, break it up, then heat for 2 more minutes. Times differ by brand, so check the pack.
How to cook haggis slices in a pan?
Heat a little oil over medium heat and fry the slices for roughly 6 to 8 minutes, turning several times, according to one Simon Howie sliced haggis listing. They must be piping hot in the middle. Grill or air fryer work too.
