Cooking with olive oil
Olive Oil Mashed Potatoes: A Dairy-Free, Stovetop Side
A mash made with extra virgin olive oil instead of butter and cream is looser, glossier and carries its own flavour rather than fading into the background. This is a technique for the stovetop, not a health claim.
The short answer
Olive oil mash is dairy-free by ingredient, not by promised benefit: warm oil folded into just-mashed potato, roughly 60–80 ml per kilo, gives a looser, creamier result than butter and cream. A fresh-garlic variation needs plain oil, not the infused range.
Mashed potato usually means butter and cream, but a version finished with extra virgin olive oil instead is a genuine stovetop technique, not a compromise.
This covers how much oil to use per kilo of potato, why it goes in warm rather than cold or boiling-hot, how the finished texture differs from a classic mash, and a fresh-garlic variation using plain oil rather than the infused range.
A dairy-free mash, by ingredient not by claim
Swapping butter and cream for olive oil is dairy-free because of what is left out, not because of any promised benefit. It suits anyone avoiding dairy, cooking for a mixed table, or wanting the fruity, peppery note extra virgin oil brings that butter cannot.
It is not a lighter or healthier version of the classic mash — that question belongs with a doctor or dietitian, not a recipe. What follows covers only how the oil behaves and how the result tastes.
How much oil per kilo of potato
A working range is roughly 60 to 80 ml of extra virgin olive oil per kilo of raw potato, added gradually. Start at the lower end and add more a tablespoon at a time until the mash pulls together.
- 1 kg potato: 60–80 ml olive oil, added in two or three additions.
- Salt: to taste, added with the first addition of oil so it dissolves into the hot potato.
- Liquid, if needed: a splash of the reserved potato-cooking water loosens the mash further without changing the flavour.
Warm oil, not cold and not scalding
The oil should be warm when it goes in, not straight from a cold bottle and not while the potato is still at a rolling boil. Warm oil folds through evenly; cold oil seizes into streaks, and boiling-hot potato can turn the mash gluey.
- Drain and steam-dry the potato in the pot for a minute off the heat.
- Mash while hot, but just off a rolling boil.
- Warm the oil briefly — a few seconds is enough, not hot to the touch.
- Fold it in with a spoon, not a whisk, in two or three additions.
How the texture differs from a butter-and-cream mash
An olive oil mash is looser and glossier than a butter-and-cream mash, which sets up thicker and richer as the butter's milk solids firm on cooling. Olive oil stays fluid at room temperature, so the mash pours more than it mounds and stays spoonable even once it has cooled a little.
The flavour sits differently too: butter mostly disappears into the potato, while olive oil keeps its own grassy or peppery note running through the dish — closer to a Mediterranean puree than a steakhouse mash.
A garlic and herb variation, with plain oil
For a garlic mash, use plain extra virgin olive oil and fresh garlic, not an infused oil — the infused range on this site covers wild thyme, blackseed, turmeric and black pepper, rosemary and basil, fennel and anise, and lavender and chamomile, and does not include garlic.
- Warm one or two chopped garlic cloves gently in a spoonful of the measured oil for under a minute, then fold both into the mash.
- For an herb version, stir in chopped parsley, chives or rosemary at the very end, off the heat.
- Keep the garlic barely warmed rather than browned, so it seasons rather than turns bitter.
The method in short
Put together, the method is short enough to hold in your head: boil, drain, mash while hot, then fold in warm oil gradually until the texture is right, seasoning and finishing to taste.
| Step | What to do |
|---|---|
| Boil | Even chunks in salted water until fork-tender. |
| Drain | Steam-dry off the heat for a minute. |
| Mash | While hot, just off the boil. |
| Fold in oil | 60–80 ml warm oil per kilo, in stages. |
| Finish | Salt, and garlic or herbs if using. |
The short version
Fold warm extra virgin olive oil into just-mashed potato, roughly 60 to 80 ml per kilo, and expect a looser, glossier mash with its own fruity or peppery note rather than butter's rich, neutral background. For a garlic version, use plain oil and fresh garlic, not an infused flavour.