Decadent Hungarian chocolate cake

The secret of a good chocolate cake is the play of textures: the sponge should be airy like a cloud, and the cream (ganache) thick and silky. The rise of the sponge isn't done by baking powder, but by physics trapped in the egg foam: tiny air bubbles expanding in the heat lift the dough high. The cream is a perfect emulsion where the cream's fat and water embrace the cocoa butter.
🕒 Prep Time 40 mins
🍳 Cook Time 35 mins
Total Time 3 hrs
🍽️ Servings 8 servings
🔥 Calories 420 kcal
🌍 Cuisine Hungarian

Ingredients

Equipment Needed

  • 22-24 cm cake tin
  • Food processor or hand mixer
  • Sieve
  • Bain-marie (optional for the cream)

Allergen Information

⚠️ Eggs
⚠️ Gluten
⚠️ Milk

Instructions

1

Preheat the oven to 180°C (standard setting, not fan). Whisk the egg whites with a pinch of salt until stiff peaks form, gradually adding half the sugar.

Tip: Salt and sugar help stabilise the protein structure of the foam so it doesn't collapse easily.
2

Whisk the egg yolks with the remaining sugar until pale and creamy, then carefully fold in the egg white foam.

Tip: Whisking until 'pale' incorporates air into the yolk, further lightening the dough. Use large movements when folding to avoid breaking the foam.
3

Sift in the flour and cocoa powder, then mix until smooth with a spatula using gentle folding movements from the bottom up.

Tip: Sifting loosens the flour and removes lumps, so you don't need to mix for long. Overmixing would activate the gluten in the flour, making the sponge tough and rubbery.
4

Pour the batter into the buttered tin and bake for approx. 30-35 minutes. Perform a skewer test: if the inserted skewer comes out clean, it's done.

Tip: Do not open the oven door in the first 20-25 minutes! The cold air rushing in will make the unstable dough collapse immediately.
5

While the cake cools, make the cream (ganache): heat the cream (do not boil!), then pour over the chopped chocolate. Let stand for 2 minutes, then stir until glossy.

Tip: The hot cream melts the cocoa butter in the chocolate. Stirring creates a stable emulsion between the fats and liquid, making it creamy.
6

Once the sponge has completely cooled, cut it in half horizontally, fill with 2/3 of the cream, and coat the top with the remainder.

Tip: Only fill a cold sponge, otherwise the butter/fat in the cream will melt and the filling will run out.

Recipe FAQ

Why did the sponge collapse?
You likely opened the oven door too early, and the sudden temperature drop caused the bubbles to collapse before the structure set.
Why is the cream grainy?
You overheated the chocolate (burnt it), or water got into it.

Ingredients

  • 6 whole Eggs (separated)
  • 120 g Plain flour
  • 120 g Granulated sugar
  • 30 g Unsweetened cocoa powder
  • 1 pinch Salt
  • 200 g Dark chocolate (min. 50%)
  • 200 ml Whipping cream (min. 30%)
  • 10 g Butter (for greasing the tin)