How-to guide
How to Make Smen — Moroccan Fermented Preserved Butter
Smen is Morocco's aged, fermented preserved butter — pungent, salty and deeply savoury, a little like a cross between ghee and a strong cheese. A spoonful stirred into a tagine, couscous or harira adds an unmistakable depth. It was born of necessity, a way to keep butter without refrigeration, and the flavour intensifies the longer it ages. Making it is mostly patience: clarify, salt, seal and wait. This guide gives a straightforward home method. To use it, see dishes like tanjia and rfissa on our Moroccan dishes index.
30 minutes plus weeks of ageing
Step by step
- 1
Start with good butter
Begin with a good-quality unsalted butter; the better the butter, the better the smen. Let it come to room temperature so it is soft and workable. Traditionally smen was made from the butter of a household's own churning, but any fine unsalted butter works.
- 2
Clarify the butter
Melt the butter gently and simmer it briefly so the water cooks off and the milk solids separate, then skim or strain them out, keeping the clear golden fat. Removing the milk solids helps the smen keep for a long time without turning rancid in the wrong way.
- 3
Work in the salt
While the clarified butter is soft but not hot, work in a generous amount of salt — smen is quite salty, and the salt is what preserves it and steers the fermentation. Some cooks knead the salt in with a little warm water, working it and pouring off the liquid, to develop flavour.
- 4
Add herbs if you like
For a herbed smen, warm the butter briefly with oregano, thyme or wild za'atar, then strain, which lends a subtle aromatic note. This is optional; plain salted smen is equally traditional. Let any herbs infuse, then remove them before sealing.
- 5
Pack and seal
Pack the salted butter into a clean, sterilised jar or a traditional earthenware pot, pressing out air pockets, and seal it tightly. Keep it somewhere cool and dark. The absence of air and the salt allow it to ferment and mature slowly rather than simply spoiling.
- 6
Age to taste
Let the smen age for at least a few weeks, and often months or longer; the flavour deepens and sharpens with time. It should smell strong, savoury and cheesy, not putrid. Use it sparingly — a little transforms a tagine, couscous or bowl of harira.
Common mistakes to avoid
- Using too little salt, so it spoils rather than fermenting into good smen.
- Not removing the milk solids, which can make it turn rancid unpleasantly.
- Sealing it in a jar that is not clean, risking bad spoilage.
- Expecting a mild flavour — smen is meant to be pungent and strong.
- Using too much in a dish; its intense flavour needs a light hand.
Tips from the kitchen
- Clarifying the butter first is the key to smen that keeps well.
- Be generous with the salt; it both preserves and flavours.
- Store in a cool, dark place in a sealed sterilised pot or jar.
- The flavour sharpens with age, so taste as it matures to find your preference.
- Use it sparingly — a small spoonful adds huge depth to tagines and couscous.
Questions
What does smen taste like?
Strong, salty and deeply savoury, with a pungent, cheesy, fermented character that intensifies with age. Some compare it to a very mature cheese or a funky aged ghee. It is meant to be assertive: a small amount stirred into a tagine, couscous or soup adds a distinctive depth that ordinary butter cannot.
How long does smen last?
A long time, which is the whole point of making it. Properly clarified, well-salted and sealed away from air in a cool place, it can keep for many months or even years, maturing and strengthening in flavour rather than spoiling. Traditionally, well-aged smen was highly prized and sometimes kept for special occasions.
How do you use smen in cooking?
Sparingly, as a flavouring fat. A spoonful is stirred into tagines, couscous, harira, rfissa or spread on warm bread, where its intense savouriness enriches the whole dish. Because it is so strong and salty, use only a little and adjust the salt in the rest of the dish accordingly.
Is smen the same as ghee?
Not quite. Both are clarified butters with the milk solids removed, but smen is heavily salted and then fermented and aged, which gives it a pungent, tangy, cheesy flavour ghee does not have. Ghee is used for its clean, nutty richness, whereas smen is prized precisely for its strong, funky depth.
Learn it hands-on in Marrakech
Reading is one thing; doing it beside a local host is another. Book a Marrakech cooking class, or explore the medina on a guided food tour.