Prague Cake

Name: Prague Cake
Total time: 780 min
Yield: 1 serving
Cuisine: Home cooking
Ingredients: Eggs — 0.5 pcs; Sugar — 22 g; Wheat flour — 16 g; Cocoa powder — 6 g; Butter — 24 g; Sweetened condensed milk — 20 g; Dark chocolate — 10 g; Salt — 1 g

A classic chocolate sponge cake layered with condensed milk buttercream and topped with dark chocolate ganache. Perfect for a festive holiday table when you want a traditional cake in small, elegant portions.

Time: 13 h
Serving: 495 kcal
Ingredients: ≈ $0.72
Protein: 8 g

Meat-free Sweet

Ingredients

1 Eggspack 10 pcs ≈ $1.93 0.5 pcs
2 Sugar 22 g
3 Wheat flour 16 g
4 Cocoa powder 6 g
5 Butterpack 180 g ≈ $1.58 24 g
6 Sweetened condensed milkpack 380 g ≈ $2.50 20 g
7 Dark chocolatepack 90 g ≈ $2.50 10 g
8 Salt 1 g

Grey rows are pantry staples: salt, oil, spices. They are not counted in the serving price.

Method

Preheat the oven to 350°F (180°C). Whisk eggs¹ with sugar and a pinch of salt for 6–8 minutes until pale and fluffy.
Gently fold in sifted flour and cocoa powder, then mix in half of the melted and cooled butter⁵. Transfer the batter to a lined cake pan.
Bake the sponge for 35 minutes at 350°F (180°C) until a skewer comes out clean. Cool completely, then slice into 2–3 layers.
For the filling, beat softened butter⁵ with a little cocoa until light, then gradually add condensed milk in small batches, whipping until smooth and creamy.
Spread the buttercream⁵ between the layers, leaving the top even. Chill the cake for 2 hours.
Melt dark⁷ chocolate with the remaining butter⁵ over a double boiler, pour over the cake, and refrigerate overnight to let the layers soak up the ganache.

Tips

Why it works: Whisk the eggs with the sugar for 6–8 minutes until the mixture is pale, so the sponge turns out fluffy and doesn't sink. If the mixture is dark, the batter will be dense.
Substitutions: Replace the 20 g of condensed milk in the cream with 20 g of honey plus 10 g of water. You can use milk chocolate instead of dark, but the glaze will be less rich.
Common mistakes: If the sponge is damp inside after baking, the oven was too hot or the batter was overmixed after adding the flour. Check with a skewer: it should come out dry.
Storing and reheating: Keep in the fridge for 3 days. Cut portions and reheat in the microwave for 15 seconds. Don't freeze: the layers will turn soggy.
Serve with: Serve with tea or coffee at the New Year table, when you want something sweet but not too heavy.

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Nutrition

Per serving and share of 2000 kcal

Calories	495 kcal	25%
Protein	8 g	11%
Fat	29 g	41%
Carbs	50 g	19%
Per 100 g	391 kcal

Cost

≈ $0.72per serving

Average supermarket prices, BLS (U.S. Bureau of Labor Statistics), October 2026. Your store will differ: products come in packs and each chain sets its own prices. The priciest item here is dark chocolate.