Kyselytsia

What it is

Kyselytsia is an ancient dish of the Lemko and Boyko communities made from oat sourdough. Oat flour or flakes from a crust of black rye bread are soaked in warm water and left for several days to ferment. The sourdough is strained and cooked with water, caraway, garlic, bay leaves, and pepper until the soup thickens.

Lemkos serve kyselytsia with separately boiled potatoes: the potatoes are placed in a bowl, covered with thick sour soup, and topped with onions fried in flaxseed or sunflower oil. On non-fasting days, they add Bryndza, sour cream, or white mushrooms.

Depending on the recipe, kyselytsia can be both a drink and a thick soup. It was mainly prepared in winter and during fasting, and it was a staple on the Christmas Eve, wedding, and church tables of the Lemkos.

In January 2026, the 'Tradition of preparing and consuming kyselytsia in the Lemko community' was included in the National Register of Intangible Cultural Heritage of Ukraine.

History and name

Oat kisiel is one of the oldest dishes in Slavic cuisine, and among the Lemkos, it has survived as a ritual dish for Christmas Eve — Viliya (Veliya). Once, kyselytsia was made from whole grain oat flour on rye sourdough; nowadays, flakes are more commonly used, with a bit of yeast added to speed up fermentation.

After the deportations of 1944–1947 and the 'Vistula' operation, many Lemko families found themselves far from the Carpathians, particularly in Ternopil and Lviv regions. There, they preserved kyselytsia as a symbol of their cuisine. The submission to the National Register was initiated by the Ternopil organization of the All-Ukrainian Society 'Lemkivshchyna' and the museum complex 'Lemko Village' in the town of Monastyryska. The Boykos also prepared kyselytsia for Christmas Eve.

Intangible heritage of Ukraine. Element of the National Inventory of the Intangible Cultural Heritage of Ukraine: Традиція приготування та споживання киселиці у лемківській спільноті (внесено до Національного переліку НКС у січні 2026 року (наказ оприлюднено 10.01.2026; номер наказу й охоронний номер з офіційним текстом не звірено)). Sources

Ingredients and allergens

Variant: lenten, with potatoes and onions

Oat flakes or oat flour1 cup of flakes or 2 cups of oat flourThe base of Lemko kiselytsia; once whole grain oat flour was used.Contains allergens: gluten

Rye sourdough breada crustA piece of black bread initiates the fermentation of oat sourdough for kiselytsia.Contains allergens: gluten

Potato500 g – 1 kgIn the mountains, potatoes are called bulba, ripa, bandurky, or kompyr — the basis for riplianka, deruny, and pies.

Onion1–2 pcs.Fried onion in lard or oil is a common seasoning in Carpathian dishes.

Linseed oil2–3 tbsp.Traditional lean oil; used to dress Lemko kiselytsia.

Garlic2 clovesA seasoning for bograch, kiselytsia, sausages, and trout.

Also: water (2.5–3 liters), caraway (1–2 tsp.), bay leaf (1–2 leaves, optional), yeast (10–25 g, optional)

Contains allergens: gluten
Diet: lenten · vegan

Variant: non-lenten, with bryndza, mushrooms, or sour cream

oat flakes or oat flour, rye sourdough bread, water, potato, onion, caraway, bryndza (sheep cheese), dried porcini, sour cream

Contains allergens: gluten, milk
Diet: vegetarian

Ingredients of the traditional recipe; every cook and every place may do it differently — please ask when ordering. We cannot guarantee the absence of allergens or traces.

How it is traditionally made

Serves: 6–8 servings

• Oat flakes or oat flour — 1 cup of flakes or 2 cups of oat flour
• Rye sourdough bread — a crust
• Water — 2.5–3 liters
• Potato — 500 g – 1 kg
• Onion — 1–2 pcs.
• Linseed oil — 2–3 tbsp.
• Garlic — 2 cloves
• Caraway — 1–2 tsp.
• Bay leaf — 1–2 leaves
• Yeast — 10–25 g

1. Sourdough: in a jar, place oat flakes or flour, a crust of black rye bread, optionally garlic and a bit of yeast, and pour in about 1 liter of warm water.
2. Cover and keep warm for 1–2 to 3–5 days, stirring daily with a wooden spoon until the mixture sours.
3. Strain the sourdough through a sieve and add 2–2.5 liters of water.
4. Bring to a boil with caraway, salt, and pepper, stirring constantly to prevent burning; cook until the kyselytsia thickens. Add garlic and bay leaves.
5. Boil the potatoes separately, and fry the onions in flaxseed or sunflower oil.
6. Place the potatoes in a bowl, pour hot kyselytsia over them, and top with fried onions.

How it is served

Hot, over boiled potatoes, with fried onions in oil; outside of fasting — with Bryndza, sour cream, or white mushrooms.

Variants

The duration of fermentation varies in sources — from 1–2 to 3–5 days. Thinner kyselytsia was consumed as a drink, while thicker was eaten as a soup.

The traditional method as described by our sources; every family does it its own way. We have not tested this recipe in a professional kitchen.

Where it is eaten

The area is approximate and based on the sources below. The dish is cooked outside it too, and ethnographic borders are blurred.

Historical Lemkivshchyna (now mostly in Poland) and the places where Lemkos were resettled after the 1944–1947 deportations — particularly the Monastyryska, Chortkiv, and Buchach regions of Ternopil; also Boykivshchyna. The area is approximate.

When it is eaten

Occasions: Christmas Eve · Lent · Weddings · Everyday food

In tradition

Oat kyselytsia was a must-have on the Lemko Christmas Eve — Viliya, as well as at wedding and church (kermesh) tables. It was mainly prepared in winter and during fasting.

FAQ