The classic Latvian cottage cheese cake with a buttery crumb base and topping and a light, creamy filling lifted by whipped egg whites. Less sweet than cheesecake, distinctly tangy, and genuinely better the next day. Makes 18 squares in a 9 x 13 in pan.
Blender Or food processor, or immersion blender (for smoothing the cottage cheese) or a sieve and spoon to push it through
Hand mixer Or stand mixer (for whipping the egg whites — a balloon whisk works too but takes longer)
Spatula For folding the egg whites
9 x 13 in (23 x 33 cm) baking dish Pyrex glass or metal
Clean tea towel or foil For covering while cooling
Ingredients
Crumb base and topping
2cupsall-purpose flour250 grams
1/2cup + 1 tbsp unsalted butter130 g unsalted butter, softened but cool
⅓cupwhite sugar85g
1½tspbaking powder
Pinchof salt
Filling
1.5lb full-fat cottage cheese 700 grams
3large eggsseparated
⅓cupsugar75 grams
2½tbspcornstarch 20 grams (or potato starch)
2½tbspsour cream38 grams
1tbsplemon zest
1¼tspvanilla extract or vanilla sugar
⅓cupraisins, soaked and drained, optional30-65 grams
Instructions
Drain the Cottage Cheese
Put your cottage cheese in a fine mesh sieve over a bowl and leave it to drain for at least an hour, ideally a few hours. The filling will not set properly if the cheese is too wet. After draining, push it through the sieve with a spoon or blend it smooth using a blender, food processor, immersion blender.
Make the Crumb for the Base and Topping
Combine flour, sugar, baking powder, and salt in a large bowl.
Add butter and rub in with your fingertips until fine, even crumbs form with no large lumps (or pulse in a food processor until the mixture looks like damp sand). The crumbs should hold together when pressed between your fingers.
I use a 9 x 13 in (23 x 33 cm) baking dish. No need to grease it or line it if it's glass. If it's metal, then I line it with baking paper. Press two-thirds of the crumb mixture firmly into the base. And keep the rest in a bowl to use for the topping.
Refrigerate for at least 30 minutes.
Make the filling
Mix the smooth cottage cheese with egg yolks, sugar, cornstarch, sour cream, lemon zest, and vanilla.
If using raisins, soak in hot water for 10 minutes, drain and then pat dry. Toss in flour and set aside.
In a clean, grease-free bowl, beat egg whites to soft peaks. They should hold a gentle curl but not be stiff.
Fold egg whites into the cottage cheese mixture in three additions, using a large spatula with gentle sweeping strokes. Stop as soon as no white streaks remain.
Assemble the cottage cheese cake:
Heat oven to 350°F (180°C / gas 4).
Pour filling over and spread evenly. Scatter flour-covered raisins over the top and push them in with a fork. Take the remaining crumb mixture straight from the fridge and scatter on top.
Bake 35-45 minutes until the top is golden and the center has just a slight wobble. Start checking at 35 minutes.
Pull it out while the center still wobbles a very tiny bit.
Remove from oven and cover loosely with a clean tea towel or foil. Cool completely at room temperature, then refrigerate at least 4 hours, overnight is better.
Slice with a clean knife, wiping between cuts.
Notes
Draining the cottage cheese: Drained weight varies by brand and batch (anywhere from 550–650 g from 700 g starting weight is normal). The filling will not set properly if the cheese is too wet. Drain for at least 1 hour, ideally longer.Eggs: Use 3 eggs if your drained cottage cheese is around 550 g. Use 4 if it's still above 600 g after a long drain.Raisins: Soak in hot water for 10 minutes, drain, and dry really well with a paper towel. Toss in a little flour before folding in. This keeps them from sinking to the bottom.Cold crumbs: Keep the crumb mixture topping in the fridge until the moment you scatter it on top. Warm crumbs may dissolve into the filling.Don't overbake: Start checking at 35 minutes. Pull it out while the center still has a faint wobble. It firms up overnight in the fridge. Overbaking is the main cause of cracking.For the larger batch (30 x 40 cm / 12 x 16 in pan, makes 12–15 squares): Crumb: 2½ cups / 300 g flour, ¾ cup / 150 g butter, ½–⅔ cup / 100–120 g sugar, 2 tsp baking powder, pinch of salt.Filling: 2.2 lb / 1 kg cottage cheese before draining, 5–6 eggs separated, ½ cup + 1 tbsp / 120 g sugar, 4 tbsp / 32 g cornstarch, 4 tbsp / 60 g sour cream, zest of 1 large lemon, 2 tsp vanilla, ⅓–⅔ cup / 50–100 g raisins optional. Baking time is the same.Make ahead: genuinely better the next day. Bake the day before, refrigerate overnight.Storage: keeps in the fridge for up to 3 days. Yeast dough version: some Latvian grandmothers make biezpienmaize with a soft yeast dough base rather than crumbs. The result is softer and more bread-like. Use a simple sweet enriched dough, press into the pan, add filling, rest 15 minutes, then bake.