Roasted garlic mashed potatoes are creamy, buttery, and deeply savoury — a proper side dish for any Sunday roast. This easy recipe uses Maris Piper potatoes, double cream, and a whole head of sweet roasted garlic for a rich, restaurant-quality mash ready in under an hour.
I've been making mash for years, and this version is the one I keep coming back to. Roasting the garlic changes the whole dish — the cloves turn mellow and sweet in the air fryer or oven, and when you stir them through hot, buttery potatoes, the flavour feels far more grown up than standard mash. These roasted garlic mashed potatoes sit happily next to a Sunday roast, a Wednesday steak, or a simple bowl of sausages. They work beautifully alongside roast chicken, beef, lamb or even a rich mushroom stew. No fancy equipment, no hard-to-find ingredients, and the texture comes out silky every single time.
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Ingredients for Creamy Roasted Garlic Mashed Potatoes
Here is what you need to make Roasted Garlic Mashed Potato:
- Maris Piper potatoes – I always choose this variety because these potatoes produce the fluffiest mashed texture. Their starch level makes them ideal for creamy mashed potatoes without turning gluey.
- Large garlic head (whole garlic) – Roasting a garlic head softens the garlic cloves and removes harshness. The result is sweet, spreadable paste perfect for roasted garlic mashed.
- Olive oil – I drizzle olive oil over the garlic before wrapping it. The roasted garlic olive oil flavour deepens the overall taste of the mashed potatoes.
- Butter – A generous knob ensures richness. It melts directly into the hot potato and builds structure before the cream goes in.
- Double cream – This gives the mashed potatoes their creamy consistency and luxurious mouthfeel. Cream binds everything together smoothly.
- Salt and freshly ground black pepper – Proper seasoning defines the final flavour. Potatoes need salt to shine.
- Parsley – Fresh parsley adds contrast and colour to the finished Roasted Garlic Mashed Potatoes.
- Aluminium foil — wraps the garlic tightly so it steams and roasts at the same time.
If you want to expand this recipe slightly, you can add white pepper, a pinch of nutmeg, or even a touch of Dijon mustard. However, I prefer to let the roasted garlic speak for itself.
How to Make Roasted Garlic Mashed Potatoes
This recipe is easy and straightforward, yet the flavour tastes far more complex than the effort suggests.
- Step 1: Start with roasting garlic. Cut the garlic bulb on top, then peel just one coating. Place garlic on foil and drizzle with olive oil. Wrap the garlic into the foil completely. It makes no sense to roast just one garlic bulb in the oven — not in this economy and climate pollution. I usually roast 6 garlic bulbs in the air fryer at 200°C for around 20 minutes, if using oven - then 200C for 40 minutes. Roasted garlic can be added to sauces, pasta dishes, meat stews and more. Once ready, unwrap the foil and squeeze the soft garlic paste out of the garlic cloves.
- Step 2: While garlic is roasting, wash, peel and wash again the potatoes. I always use Maris Piper variety because it works best for mashed potatoes. Cut into medium chunks, place in a large pot and cover with cold water. Add a sprinkle of salt. Place on the stove on high heat, wait until it boils and then reduce.
- Step 3: Cook the potatoes until fork tender, then remove the water completely. Add creamy butter and, using a potato masher, mash the potato until smooth. You can melt the butter prior adding it to the potatoes, but for me adding just a knob works as well.
- Step 4: Gradually add double cream and stir in roasted garlic. Check for salt and adjust if needed. Finish with a generous twist of freshly ground black pepper.
Cooking tips:
- Allow excess steam to escape after draining before adding butter to prevent watery mashed texture.
- Always begin with cold water when boiling potatoes; this ensures even cooking throughout.
How to Serve and Store Roasted Garlic Mashed Potatoes
I serve Roasted Garlic Mashed Potatoes immediately while they are hot and creamy, topped with chopped parsley and of course an extra small knob of butter melting over the surface, and that's heavenly! They pair beautifully with roast turkey, beef or chicken stews, or try with those simple, but wonderful mushrooms. They also sit well under a rich sausage casserole or next to pan-fried fish. For a lighter plate, match them with roasted vegetables and a green salad.
To store, allow the Roasted Garlic Mashed Potatoes to cool fully before transferring them into an airtight container. Keep in the fridge for up to 2 days, please do not freeze - it would become mushy and unpleasant, better cook it again. When reheating, add a splash of cream and warm gently on the hob, stirring continuously to restore the creamy consistency. Avoid microwaving at high power, as it can dry the potato and dull the garlic flavour.
Tips and Notes for the Best Roasted Garlic Mashed Potatoes
1. Pick the right potato. Maris Piper are my first choice for roasted garlic mashed potatoes because they are floury and break down into a light, fluffy texture. King Edward and Rooster are both excellent alternatives and easy to find in most supermarkets. Waxy potatoes or new potatoes hold their shape too firmly and turn the mash into something closer to a potato salad. The variety matters far more than the brand, so check the label in the supermarket before buying.
2. Roast the garlic until it is really soft. The cloves should feel like a soft paste when you press them, not firm or rubbery. Under-roasted garlic still has a sharp, raw edge that throws the flavour off. Properly roasted garlic is mellow, sweet, and almost caramelised, and that is what you want running through the mash. If in doubt, give it another 5 minutes in the air fryer or oven.
3. Use the air fryer to save time. Roasting a whole head of garlic in the air fryer takes around 20 minutes, compared with 40 in the oven. The result is just as sweet and soft, and you use far less energy. Wrap the head tightly in foil so the cloves steam and roast at the same time. I often do two or three heads at once and save the extras for dressings and spreads through the week.
4. Let the steam escape before mashing. After draining, leave the potatoes in the colander or the warm pot for a minute or two. This small pause dries them out and stops the mash from turning wet or gluey. Mashing water-logged potatoes is the quickest way to ruin your roasted garlic mashed potatoes with a heavy, sticky texture. It is a tiny step that makes a real difference.
5.Cut the potatoes to the same size. Evenly sized chunks cook through at the same rate, which means no raw middles and no mushy edges. I aim for pieces around 3 to 4 cm across, which usually takes 15 to 20 minutes to boil. If the chunks vary too much, the small pieces start to break apart before the larger ones are tender. A chopping board and a sharp knife sort this in under a minute.
6. Start the potatoes in cold water. Adding them to cold salted water and bringing it up to the boil together gives even cooking right through to the middle. Drop them straight into already-boiling water and the outsides cook faster than the centres. Season the water generously — it seasons the potato from the inside and is the first layer of flavour. I use about a teaspoon of sea salt per litre of water.
7. Make it ahead if needed. These roasted garlic mashed potatoes hold well for a couple of hours in a warm oven at around 90°C, covered with foil. Stir in a splash of warm cream just before serving to loosen the texture back up. For a longer head start, cool the mash fully, chill it, then reheat gently in a saucepan with extra butter and cream. It works beautifully for Christmas, Sunday lunch, or any meal where you want one less thing to do at the last minute.
Roasted Garlic Mashed Potatoes FAQ
What are the best potatoes for mashing in the UK or ROI?
Maris Piper are my top pick for these roasted garlic mashed potatoes because they are floury, starchy, and break down into a light, fluffy mash. King Edward and Rooster are both excellent second choices and easy to find in most UK supermarkets. Avoid waxy varieties such as Charlotte, Jersey Royals, or new potatoes, as they hold their shape and never reach that creamy, melt-in-the-mouth texture.
Can I roast garlic in the air fryer?
Yes, and the air fryer is now my default method. Set it to 200°C, wrap the garlic head in foil with a drizzle of olive oil, and roast for around 20 minutes. The result is just as soft and sweet as the oven version, in a fraction of the time and with far less energy used.
Can I make this recipe without cream?
You can. Swap the double cream for warm whole milk, buttermilk, or crème fraîche if you prefer something lighter but still creamy. The resulting roasted garlic mashed potatoes will be slightly looser with milk and a touch tangier with buttermilk, but the dish still tastes rich thanks to the butter and roasted garlic.
How long should I boil potatoes for mash?
Cut into 3 to 4 cm chunks, the potatoes usually take 15 to 20 minutes from the moment the water reaches a boil. Test by pushing a fork into the largest piece — it should slide through with no resistance. Under-cooked potatoes will leave lumps even with hard mashing, so give them an extra couple of minutes if in doubt.
Why is my mash gluey?
Gluey mash is almost always caused by over-working the potatoes or by using waxy varieties. Every extra push of the masher releases more starch, and in a food processor or electric whisk it happens within seconds. Stick to floury potatoes, a traditional masher, and stop as soon as the mash is smooth.
Can I add cheese or other herbs?
Absolutely. A handful of grated Parmesan or strong Cheddar stirred in at the end gives a salty, savoury lift. Fresh thyme, chives, or rosemary also work well — chop them finely and add at the last moment so they stay bright. Keep the additions gentle so the sweet roasted garlic still comes through.
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Roasted Garlic Mashed Potatoes
Roasted Garlic Mashed Potatoes are smooth, buttery and full of sweet roasted garlic flavour. Made with Maris Piper potatoes, double cream and a generous knob of butter, this side dish delivers a creamy texture perfect for roast dinners.
Ingredients
- 1 large garlic head
- Olive oil for drizzling
- 1 kg Maris Piper potatoes (2.2 lb)
- Large knob of butter (about 60 g / 4 tbsp)
- 50 ml double cream (3 tbsp)
- Salt to taste
- Freshly ground black pepper to taste
- Fresh parsley to garnish
Instructions
- Preheat your air fryer to 200°C. Cut the top off the garlic head and peel away just one outer layer. Place it on foil, drizzle with olive oil and wrap tightly. Roast for around 20 minutes until soft. Remove and allow to cool slightly, then squeeze the softened garlic cloves out into a bowl. If using oven - the same 200 degrees C but roast for longer - around 40 mintues.
- Wash, peel and wash the potatoes again. Cut them into medium-sized chunks. Place them in a large pot, cover with cold water and add a pinch of salt. Bring to the boil over high heat, then reduce and simmer until fork tender.
- Drain the potatoes completely and allow excess steam to escape. Add the butter while the potatoes are still hot and mash using a potato masher until smooth.
- Gradually pour in the double cream while stirring. Add the roasted garlic paste and mix thoroughly. Season with salt and freshly ground black pepper. Garnish with chopped parsley and serve hot.
