By Nik, founder of 東歐嚴選｜kefir.link and former chef · Updated 2 November 2026
Roasted sweet potato has a dense, soft texture and a simple sweetness, and here it becomes a cool, creamy cheesecake with tender cubes of roasted potato scattered over the top. Strained kefir cheese is soft like fresh cream cheese and as pleasantly sour as kefir itself, which keeps the sweetness in balance. Gelatin does the setting in the refrigerator, so the oven stays off.
From a winter street snack to a chilled cake
In Japan, roasted sweet potato is the classic autumn and winter street snack, once sold from small trucks carrying a stone roasting pot and usually eaten just as it is. Japanese home bakers also fold it into no-bake cheesecakes, because the potato's faint sweetness suits the refreshing sourness of fresh cheese and yogurt. One two-colour Halloween version adds a purple sweet-potato layer over a black cocoa biscuit base. An autumn version folds in sweetly cooked apple and finishes with caramel apple on top.
Why slow roasting makes a sweeter potato
Sweet potatoes turn their starch into sugar fastest at around 70°C, so long, gentle heat makes a sweeter potato than quick cooking. Wrapping the potatoes in foil gives very moist, tender flesh with soft skin, while unwrapped potatoes turn out fluffier and drier. If you are roasting your own, wrap them in foil and bake at 180°C for about an hour, then check with a skewer, because thick and thin potatoes cook at different speeds. A masher can replace the food processor if you like a filling with more texture.
Kefir cheese and gelatin, the quiet partners
Kefir cheese is simply kefir with the whey drained away, and straining time decides its texture. An overnight strain gives a creamy cheese, a day or two gives a firmer one, and pressing it under a weight can make it crumbly. Gelatin needs cold and time to bind the filling, and it loses its setting power in boiling liquid. Agar is not a simple swap, because it starts setting at room temperature, mixes poorly with cold ingredients and sets firmer.
Chilled roasted sweet-potato kefir cheesecake
Ingredients
- 250 g strained kefir cheese Use plain, unsalted kefir cheese; weigh after straining. Allow about 24 hours to strain milk kefir in the refrigerator. A 500 g bottle yields about 200 g of cheese, so prepare two bottles.
- 500 g roasted sweet potatoes Use two roasted sweet potatoes, each about 250 g with the skin on: one for the filling and one for the topping. Thaw frozen roasted sweet potatoes in the refrigerator first.
- 30 g light cane sugar
- 50 ml milk Cold, for soaking the gelatin.
- 5 g unflavoured powdered gelatin Choose gelatin powder that needs soaking before it is gently heated to dissolve.
You will need
- 23 × 15.5 cm rectangular container
- Food processor, or mixing bowl and potato masher
- Small saucepan and spoon
- Kitchen scale and measuring jug
- Knife and chopping board
- Spatula
- Plastic wrap
- Refrigerator
Instructions
- Peel the sweet potato for the filling and cut it into chunks.
- Blend the peeled sweet potato and sugar in a food processor until smooth.
- Add the kefir cheese and blend until smooth and evenly mixed.
- Sprinkle the gelatin over the cold milk in a small saucepan and leave to soak for 5 minutes.
- Warm the milk over low heat, stirring until the gelatin dissolves completely without letting it boil.
- Mix a few spoonfuls of filling into the warm gelatin milk, then blend this mixture into the remaining filling.
- Pour the filling into the rectangular container and level the surface with a spatula.
- Cut the remaining roasted sweet potato, skin on, into 1 cm cubes and spread them evenly over the filling.
- Cover loosely with plastic wrap and refrigerate for at least 3 hours, leaving it longer if the filling has not set.
Comments
No comments yet.
Comments could not be loaded.
Join the discussion
or