What Is Lamb's Lettuce? Mâche, Season and Storage

Hello lovelies,

Some ingredients you buy three times and throw away three times before you understand how they work. Mâche was one of those for me.

First it had a different name in every recipe. Then it crunched between my teeth even though the bag said washed. And if I bought it on Monday to eat on Wednesday, all I found in the crisper drawer was a sad dark pile.

Which is a shame, because it is one of the loveliest greens there is, and it is at its best exactly when nothing else is growing. So here is what I know about it now: why it has so many names, when it is actually good, how to get the grit out, and what to use when you cannot find it.

Lamb's lettuce, mâche, corn salad: one plant, many names

All of these names mean the same small plant: Valerianella locusta. Which one you hear depends only on where you happen to be standing.

Botanically it is not a lettuce at all. It belongs to the valerian family and has no relation to romaine or iceberg. That detour explains the flavor: the essential oils in the leaves give it the nutty note that earned it its Swiss name. Nüssli, because it tastes of nuts.

And yes, Rapunzel is the same name as in the fairy tale. The pregnant woman in the Grimm story was craving exactly this green from the neighbor's garden, and her daughter was named after it. It is one of the few times a Grimm tale turns up in the crisper drawer.

What this means for you in practice is mostly one thing: if a recipe calls for corn salad and your store sells mâche, it is the same bag.

When is lamb's lettuce in season?

In Europe the main season for field-grown crops runs from October to December, according to Germany's federal center for nutrition, which names Baden-Württemberg and Rhineland-Palatinate as the main growing regions. In the US the picture varies by region and by grower, and much of what reaches supermarkets is grown under cover year-round.

The reason for the winter timing is the cold. This is a genuinely frost-hardy plant that keeps growing long after everything else has been cleared. It is one of very few greens that can come from nearby fields in the middle of winter instead of traveling a thousand miles.

It is now grown year-round, in the field or under tunnels and glass, which is why you also see it in July. That is not a bad thing, but it is a different product: greenhouse leaves are larger, paler and softer, and the nutty flavor is noticeably weaker.

How to spot field-grown without reading the label: small, dark green, tightly closed rosettes. The smaller the leaf, the more intense the flavor. Large pale leaves are almost always grown under cover.

When you buy it, look for deep green, firm leaves with no wilted or yellow patches, which is also what Germany's federal nutrition center advises. One more thing that makes a real difference: buy it loose rather than in a clamshell where you can. In a sealed pack it sits in its own condensation, and that costs it days. And leave the root stubs on as long as you can. They hold the rosette together, and the green stays noticeably crisper for it. Trim them in the kitchen, not before.

So if you see it in August and wonder whether it is worth it: it is perfectly edible, but it is considerably better in November. Until then summer has plenty to offer.

How do you wash lamb's lettuce properly?

Not under a running tap. Put the rosettes in a bowl of cold water, swirl them gently, and lift them out after a few minutes. That is also exactly how Germany's federal nutrition center describes it.

The reason is the shape of the plant. It grows as a flat rosette sitting directly on the soil, so the grit is not on top of the leaves, it is underneath, between them, at the root end. A jet from the tap runs over the top and tends to push the sand further in. In still water it releases and sinks.

Here is how I do it:

1. Trim the root ends with a sharp knife, close enough that the rosette still holds together.
2. Fill a large bowl with cold water and lay the rosettes in. Lay them in, do not tip them in.
3. Swirl gently, let it stand a few minutes, then lift the leaves out. Do not pour the bowl through a strainer, or you tip all the grit straight back over them.
4. Change the water and repeat, 2 to 3 times, until nothing grits at the bottom of the bowl.
5. Spin dry, gently, or spread the leaves on a towel.

And yes, this applies to the bag marked washed too. Pre-washed is cleaner but rarely grit-free, because the sand clings stubbornly at the root end. A pass through the bowl takes 2 minutes and decides whether the salad crunches or not. I do it every time now, even with the expensive organic bags.

One less obvious point to finish on: wash it briefly, and only just before you eat it. Salad greens leach water-soluble nutrients into the washing water the longer they sit in it. A long soak costs you texture and some of the vitamin C.

How long does lamb's lettuce keep?

1 to 2 days in the refrigerator, and that is not a cautious estimate, it is the reality. This is the opposite of a storage vegetable.

The odd part: out in the field it survives well below freezing without damage. Once harvested it collapses within days. The tender leaves lose water fast, and because it grows as a loose rosette it has almost no protective outer leaves the way a head lettuce does.

What makes even those 2 days possible:

Store it unwashed. Moisture on the leaves speeds everything up. Wash it when it is going on the plate.

Loose and airy. A slightly damp towel around the bunch, then into the crisper drawer open or in a perforated box. Sealed airtight, condensation forms and it goes faster still.

Nothing on top of it. It bruises easily, and any bruise darkens within a day.

Away from apples and pears. Both give off ripening gas, and salad greens are sensitive to it. How that principle runs through the whole produce drawer is in my guide to storing summer vegetables.

One rescue that often works: if the leaves are only limp but still green, drop them into ice-cold water for 10 minutes. They draw water back in and firm up again. Once there are yellow or glassy patches that is past saving, and those get sorted out.

Freezing does not work. The leaves are almost entirely water and turn to mush on thawing. If you have too much, pesto is the better answer than the freezer.

How much iron is really in it?

It carries 2.18 mg of iron per 100 g (3.5 oz), more than twice what romaine holds and over 5 times iceberg, and it leads the whole group on vitamin C at 38.2 mg.

One thing worth knowing before you trust any single iron figure: European databases measure this plant very differently. The Swiss food composition database puts its iron at 0.4 mg per 100 g, roughly a fifth of the US value. Variety, soil and season all move the number, so read iron here as a range rather than a fixed fact.

The more interesting part is what follows from it. Plant iron is absorbed less readily than iron from animal foods, unless vitamin C is present at the same time. The Harvard T.H. Chan School of Public Health puts it plainly: vitamin C taken at the same meal improves the absorption of non-heme iron. And this green brings both to the table by itself.

In practice that means a squeeze of lemon in the dressing is not a garnish, it is the difference. Apple, orange or pomegranate in the salad does the same job. Dress it with oil and balsamic alone and you leave part of the effect on the table.

And since the question always comes up: no, this is not an iron supplement. It is a salad green that happens to bring a smart combination with it. That is plenty.

That is exactly how it looks on our plates: in the lamb's lettuce with apple and lentils the acidity is already in the fruit and the dressing.

Lamb’s lettuce with apple & lentils

Lamb’s lettuce with oven vegetables and tofu

Carrot-Lentil Soup

Pumpkin soup with pears

What goes with lamb's lettuce?

Anything that brings sweetness, acidity or roasted flavor. Its nutty note is delicate, but it does not disappear.

The classic pairing across German-speaking Europe is apple or pear with nuts. It works because the fruit supplies the acidity, the nut picks up and amplifies the note in the leaves, and both are in season at exactly the same time. Which apple varieties stay crisp and which collapse is in my guide to the best apples for baking.

What else works:

• Anything roasted. Squash, sweet potato, Brussels sprouts or beets, still warm, over the cold leaves. That turns a salad into a main. Which squash to use is in my complete pumpkin guide.
• Lentils. They make it filling without making it heavy, and their earthiness suits the nutty note.
• Chestnuts and pumpkin seeds. Both bring roasted flavor, and both are in season at the same moment.
• A mustard dressing. Mustard is assertive enough to hold its own without flattening the leaves.

And then there is the side almost nobody mentions: it does not have to stay raw. Germany's federal nutrition center specifically suggests it for green smoothies, for pesto, with pasta and as a spread, and it also works in a creamy soup with potato or squash.

Pesto is the version I reach for most. Blend the leaves with nuts or pumpkin seeds, a little garlic and olive oil, season, done. It is also the only sensible answer to the question of what to do with too much of it, since freezing is out. In soup it goes in at the very end and steeps only briefly, or it loses both color and aroma.

What does not work is letting it sit in dressing. The leaves collapse within minutes. Dress it right before serving, never ahead.

What can you use instead of lamb's lettuce?

Baby spinach comes closest, then arugula if you can live with more bite.

This is the question that comes up most often in our kitchen, because here in Bali it simply does not exist. It grows in cool climates, and cool is not what we have.

Baby spinach is the best substitute. Similar tenderness, similar dark leaf, mild in flavor, and it takes the same dressing. What it lacks is the nutty note, and you bring that back with toasted nuts or pumpkin seeds.

Arugula works structurally and visually but carries a distinct peppery bite. In a salad with apple and nuts that is arguably a gain; in a very mild dish it takes over.

Young chard leaves or bagged baby spinach are the pragmatic answer when you are in a hurry.

How much the substitute matters depends on the recipe. If the green is only a bed under something warm, almost any tender leaf will do and nobody notices. If it is the main event, it is worth hunting for the right one.

What I would not reach for is romaine or iceberg. Both are watery and mild to the point of blankness, and a recipe built on the flavor of this green loses exactly the thing it was built on.

And when the salad has to be dinner, lamb's lettuce with oven vegetables and tofu is our default.

Autumnal Bircher Muesli

Vegan Chestnut Cake

Vegan pumpkin lasagne

Sweet potatoe pumpkin soup

Lovelies, mâche is my proof that the cold months lose nothing at the table. While nothing else is growing outside, it sits in the ground and gets better for the frost. If you spot it at the market this year: take the small dark rosettes, swirl them properly, eat them the same day. And if you want ideas for cold-weather cooking, have a look at our e-books in the shop.

Tell me in the comments: what do you call it where you live?

Yours, Verena

Recipes to try

Lamb’s lettuce with oven vegetables and tofu

Lamb’s lettuce with apple & lentils

Carrot-Lentil Soup

Autumnal Bircher Muesli