Finnish name: Ruokakerma (ROO-oh-kah-KEHR-mah) /ˈruo.kɑ.ˌker.mɑ/
Literal translation: “Food cream”
English equivalent: Cooking cream
Fat content: 10–22% for actual ruokakerma. The standard Valio and Arla versions sit at 10–15%, while Arla Ruokakerma Täyteläinen goes up to 22%. Below 10% fat, the product legally can’t use the word “kerma” at all — those are rasvasekoite (fat mixtures), not cream.
Common brands: Valio (including lactose-free/laktoositon), Kotimaista, Arla

What It Is

Ruokakerma is a pourable cooking cream designed specifically to behave well under heat. If you’re coming from an American kitchen, half-and-half is the closest thing in terms of fat content. However, ruokakerma has a trick that half-and-half doesn’t: starch mixed in during production that makes it heat-stable. You can simmer it in a sauce for thirty minutes and it won’t curdle or break, which is something even heavy cream can’t always promise.

It sits in the middle of the Finnish cream hierarchy, which runs roughly like this:

• Täysrasvainen kerma (≥48% fat) — full-fat cream, rare in stores
• Vispikerma (38%) — whipping cream, UHT, for cakes and piping
• Kuohukerma (35%) — all-purpose cream, pasteurized, the “real cream” to purists
• Ruokakerma (10–22%) — cooking cream, starch-stabilized, the everyday workhorse
• Kevytkerma (10%) — light cream
• Kahvikerma (10%) — coffee cream, doesn’t cook well

If a Finnish recipe calls for ruokakerma, it’s asking for that heat stability as much as it’s asking for creaminess. Kuohukerma (35%) will curdle if you boil it too long. Ruokakerma won’t. That’s the point.

It’s sold in cartons (typically 2dl, 3.3dl, or 1L) and comes in both regular and lactose-free (laktoositon) versions. In Finland, lactose-free dairy isn’t a specialty product shoved into a sad corner — it’s standard inventory, same shelf, often the same carton with a small “laktoositon” label. Many people buy it by default when cooking for others, just to be safe. All cream types in Finland are available in laktoositon versions.

What It Does

Ruokakerma is everywhere in the Finnish kitchen — pasta sauces, soups, casseroles, gratins, and anything that needs a creamy finish without the weight of full cream. It won’t whip (you need at least 25% fat for that), but it will simmer, reduce, and enrich without breaking.

It also comes in flavored versions: Valio makes a Aura sinihomejuusto (blue cheese, 10%) and various herb varieties that are essentially ready-made sauce bases. Be aware that the flavored ones can be surprisingly salty — up to 1.4g salt per 100g in some cases.

What It’s Made Of

This is where it gets interesting. Read the label on a carton of ruokakerma and you’ll find: cream, water, and modified corn or tapioca starch. It’s not just diluted cream — the starch is a functional ingredient that prevents the cream from curdling under sustained heat.

A food science investigation by Kuluttaja magazine found that the less fat a “cooking cream” product has, the more additives it needs to maintain a creamy texture. Professor Anu Hopia of the University of Turku described the very lightest versions as “basically thickened water.” The products below 10% fat can’t legally call themselves cream at all — they’re labeled rasvasekoite (fat mixture) and rely heavily on stabilizers and emulsifiers to feel like cream.

So when you’re standing in the dairy aisle: if it says “ruokakerma” on the label, it’s actual cream (with starch). If it says “rasvasekoite” or just “ruoka” without “kerma,” it’s a cream substitute. Both work for cooking, but the cream versions taste better.

Why It Matters

If you’re cooking from Finnish recipes in an English-speaking kitchen, ruokakerma is probably the ingredient that will trip you up first. Finnish recipes call for it constantly. If you substitute heavy cream, your dish will be significantly heavier than intended. If you substitute half-and-half, you’ll get the fat content right but lose the heat stability — half-and-half can curdle in long-simmered dishes because it doesn’t have the starch.

The best substitution: mix equal parts heavy cream and whole milk (roughly 15% fat), and if the dish involves prolonged cooking, add a small pinch of cornstarch to help it hold together.

Going the other direction, ruokakerma makes an excellent substitute for heavy cream in recipes where you want the creaminess without the weight. It produces a silkier, lighter result in custards and puddings.

The Carrageenan Question

If you spend any time reading Finnish food forums, you’ll encounter heated debates about karrageeni (carrageenan, E407) — a seaweed-derived stabilizer added to many Finnish dairy products since around 2015. It prevents fat from separating during storage, which matters more in longer-shelf-life products.

Valio actually removed carrageenan from their kuohukerma in 2018, then added it back because customers complained about the fat layer forming on top. Arla’s kuohukerma contains it; Maitokolmio’s doesn’t. The Valio Luomu (organic) kuohukerma is both carrageenan-free and lactose-free.

Ruokakerma sidesteps this debate somewhat because it already contains modified starch as a stabilizer. The standard Valio Eila 10% ruokakerma lists: cream, water, corn and tapioca starch. No carrageenan. Check the label on your specific brand if this matters to you.

I’ll be doing a deeper dive into the carrageenan conversation in a future entry. For now: it’s an ongoing cultural discussion here, not settled science, and Finns have strong opinions.

Kitchen Notes

• It’s lighter than you think. 300ml of ruokakerma weighs about 304g — slightly less than the same volume of maitojuoma (340g), because fat is lighter than water. This matters if you’re converting between volume and weight measurements.
• It makes better Bird’s Custard than milk does. This was an accidental discovery — ruokakerma produces a silkier, more mousse-like set compared to the firmer texture you get with milk. If you’re making any kind of stovetop custard or pudding, it’s worth trying.
• It’s not vispikerma or kuohukerma. Vispikerma (38%, UHT) and kuohukerma (35%, pasteurized) are whippable creams for different purposes. If your recipe says vispikerma, it wants something that whips. If it says kuohukerma, it wants a richer all-purpose cream. If it says ruokakerma, it wants the heat-stable everyday workhorse. They’re not interchangeable.
• The cultural side-eye. Some Finns view ruokakerma the way some Americans view Velveeta — a manufactured product that’s technically useful but isn’t “real” cream. Finnish food forums are full of people saying “just use kuohukerma and add water yourself.” They’re not wrong about the composition, but ruokakerma earns its shelf space through convenience and heat stability. Use whichever you want; just know the tradeoffs.
• Not just thinner — more stable. Commercial ruokakerma often contains stabilizers that make it nearly impossible to curdle. Kuohukerma handles heat well in applications where sugar provides stabilization (like kinuski), but for sauces you’re going to boil aggressively, ruokakerma is more forgiving.

This entry was originally published in March 2026 and substantially revised in April 2026 after a deeper dive into Finnish dairy regulations, cream composition, and cultural context. I’m an American expat, not a food scientist — I’m learning alongside you. If something’s wrong, tell me.