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Skyr (/ˈskɪər/ SKEER; Icelandic pronunciation: [ˈscɪːr̥]) is a traditional Icelandic cultured dairy product. It has the consistency of strained yogurt, but a milder flavor. Skyr can be classified as a fresh sour milk cheese, similar to curd cheese consumed like a yogurt in the Baltic states, the Low Countries and Germany.^[1] It has been a part of Icelandic cuisine for centuries.^[2]

Skyr has a slightly sour dairy flavor, with a hint of residual sweetness. It is traditionally served cold, sometimes with cream. Commercial manufacturers of skyr may add flavors such as vanilla, coffee, or fruit.^[3]

Etymology

The word skyr is related to the English word shear (to cut), referring to how the milk is split into the liquid whey and the thick skyr.^[4]

History

Skyr is mentioned in a number of medieval Icelandic sources, including Egil's saga and Grettis saga.^[5] It is however unclear how similar this was to modern-day skyr, as no detailed descriptions of skyr exist from this period. Originally it was made from sheep milk, but today the world is most familiar with the cow's milk version.^[6]

In Scandinavia different versions of the word skyr have been used for various cultured milk products since the middle ages^[7] and still today. These are usually made without any cooking,^[8] but by adding culture to skimmed milk and leaving it to ferment. Rennet is usually not used. This skyr (skjør in standard Norwegian) might be eaten with bread, watered down and drunk, cooked in porridge, mixed with sour-cream to dip flatbread in,^[9] or cooked to split into curds such as in skjørost, gamalost or skjør-kjuke^[10] for eating and sour whey for drinking.^[11]

A process more similar to the Icelandic skyr is found in Østerdalen, Norway. Here a product called kjellermjølk is made by heating skimmed milk, cooling it, then adding the culture and often rennet gradually.^[12] The resulting split liquid can be kept for months.

Nutrition

Skyr is a high-protein, low-fat product made from low-fat milk, varying slightly between brands. Unflavored skyr has roughly 13 g protein, 4 g carbohydrates, and 0.2 g fat per 100 g.^[13]

Uses

Skyr is usually mixed with sugar and cream. A traditional Icelandic dish is made of roughly equal amounts of skyr and porridge. Skyr is often mixed with jam or fruit for a dessert, with prepared fish for dinner, or with cereals for breakfast. Contemporary uses include using skyr as a cheesecake topping and as an ingredient in milkshake or fruit smoothies.

Production

Today, skyr is made from skimmed milk which is either pasteurized or heated to at least 72–75 °C (162–167 °F) for 15–20 seconds, and then cooled down to 37 °C (99 °F).^[14] A small portion of a previous batch of skyr is then added to the warm milk to introduce the essential culture (the active bacterial culture), and with the addition of rennet the milk starts to curdle.^[15] It is left to ferment for 5 hours before being cooled to 18 °C (64 °F).^[15] Then the product is strained through fabric to remove the liquid whey.^[15]^[2]

Bacteria such as Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus play an important role in the fermentation of skyr.^[15] They also play a major role in the production of yogurt, but the yeast which is active in the low temperature step ensures that the product becomes a skyr and not a yogurt.^[15]

Commerce

Skyr is commonly consumed in Iceland.^[16] Efforts at marketing it outside of Iceland began in 2005 when it was exported to the U.S. and sold at the natural-foods market Whole Foods Market.^[17]^[18] Licensed production began the next year in Denmark and Scotland.^[17] Mjólkursamsalan (the major dairy cooperative in Iceland) and its associates registered "skyr" as a trademark in some countries, but this was later ruled to be invalid, as "skyr" was found to be a generic term like "milk".^[19]^[20]

The commercial distribution of skyr outside of Iceland increased in the 2010s, with marketing as a low-sugar, no-fat, high-protein product consumed as a snack.^[21] In 2012, 80% of exported Icelandic skyr went to Finland and 20% to the U.S.^[22] Numerous skyr parlors were opened in Finland in 2019.^[23]

Skyr is also made in other countries.^[24]

Brands

Some commercially manufactured skyr brands, many not made in Iceland, are:^[25]

Arla
Fen Farm Dairy skyr (UK)^[24]
Thor's Skyr (US)
Icelandic Provisions
Ísey skyr
Kea skyr
Siggi's skyr (US)
Smári
Lifeway
Green Mountain

References

^ Guðmundur Guðmundsson (23 February 2007). "Hnigfræði og smásæ bygging skyrs: Abstract" (in Icelandic and English). Archived from the original on 10 July 2012. Retrieved 25 April 2012.
^ ^a ^b "About the production of skyr" (in Icelandic). Mjólkursamsalan. 6 February 2005. Archived from the original on 6 February 2005.
^ Severson, Kim (14 September 2005). "Iceland woos America with lamb and skyr". New York Times. Retrieved 25 June 2018.
^ Ásgeir Blöndal Magnússon (1989). Icelandic Etymological Dictionary (in Icelandic). ISBN 9789979654018.
^ Tirosh, Yoav (2020). "Milk, Masculinity, and Humor-Less Vikings – Gender in the Old Norse Polysystem". Limes. 13: 136–150.
^ Narvhus, Judith A.; Abrahamsen, Roger K. (July 2023). "Traditional and modern Nordic fermented milk products: A review". International Dairy Journal. 142. doi:10.1016/j.idairyj.2023.105641.
^ Grøn, Fredrik (1927). Om kostholdet i Norge indtil aar 1500 (in Norwegian). Oslo: Jacob Dybwad. pp. 93–94.
^ Godø, Marie (1985). Mat- og drikkeoppskrifter frå Indre Nordfjord i eldre tid (in Norwegian). Stryn bondekvinnelag. p. 11.
^ Moen, Eirik (1991). Bygdaboka for Voll. 3 : Den gamle bygda (in Norwegian). Bygdaboknemnda for Voll. p. 269.
^ Gamle matoppskrifter frå Vågå (in Norwegian). Vågå bondekvinnelag. 1978. p. 26.
^ Smørvik, Per (1979). Melkstell (in Norwegian). vefsn bygdesamling. p. 20.
^ Sopp, Olav (1914). Surmelk (in Norwegian). Olaf Norli. p. 31.
^ "Nutritional values for KEA skyr hrært". Mjólkursamsalan (in Icelandic). Retrieved 26 February 2019.
^ Binda, Sylvie; Ouwehand, Arthur C. (2019). "Lactic Acid Bacteria for Fermented Dairy Products". Lactic Acid Bacteria. CRC Press. p. 181. ISBN 9780429615641.
^ ^a ^b ^c ^d ^e Björn Sigurður Gunnarsson (11 April 2003). "Hvernig er skyrgerillinn til kominn?". Vísindavefurinn (in Icelandic). Retrieved 26 February 2019.
^ "Icelandic skyr now makes up 2% of the US yogurt market". Icelandmag. Fréttablaðið. 23 March 2017. Retrieved 26 February 2019.
^ ^a ^b "Ársskýrla Auðhumlu 2006" (PDF). 2006. p. 13.
^ "Sigurför skyrsins". Morgunblaðið. 26 August 2005. p. 8.
^ "MS missir spón úr aski sínum: Skyr er vörutegund en ekki vörumerki". Stundin. 6 September 2017. Retrieved 14 January 2021.
^ "Arla lagði MS í deilu um skyr í Finnlandi". RÚV (in Icelandic). 28 September 2017. Retrieved 14 January 2021.
^ "Welcome to skyr, the Viking 'superfood' waking up Britain". the Guardian. 27 November 2016. Retrieved 14 January 2021.
^ "Skyr selt erlendis fyrir 650 milljónir - Viðskiptablaðið". www.vb.is. Retrieved 14 January 2021.
^ "Finnar óðir í ísey skyr: 25 barir opnaðir í landinu". hringbraut.frettabladid.is. Retrieved 14 January 2021.
^ ^a ^b "Fen Farm, Natural Skyr Yoghurt". Pipers Farm. Retrieved 13 September 2024. An example of non-Icelandic skyr, UK-made, must be sold as Icelandic-style, not Icelandic..
^ Jordan Myrick (16 January 2023). "The Best Skyr Icelandic Yogurts, by the Power of Thor". www.sporked.com. Retrieved 7 May 2023.