Black Prince Cake

Ingredients

• 2 eggs
• 130 g sugar
• 30 g neutral-flavored vegetable oil
• 160 g kefir
• 160 g flour
• 0.67 tsp baking soda (2/3 tsp)
• 25 g cocoa powder
• 0.67 tsp baking powder (2/3 tsp)
• 375 g sour cream, 25–30% fat (Source specifies: 350–400 g.)
• 200 g heavy cream, 33% fat (Must be cold.)
• 40 g powdered sugar (Source specifies: 30–50 g, to taste.)

Steps

1. 1

   Whisk the eggs with the sugar. Pour in the vegetable oil and kefir, and mix. Add the baking soda and mix again.

2. 2

   In a separate bowl, combine the flour, cocoa powder, and baking powder.

3. 3

   Sift the dry mixture into the wet mixture and whisk thoroughly until you have a smooth batter.

4. 4

   Pour the batter into an 18–20 cm cake pan. If using an adjustable cake ring, wrap the bottom with foil. For a pan with a removable bottom, line it with parchment paper; otherwise, the batter may leak out.

5. 5

   Bake the sponge at 170 °C for approximately 40–50 minutes. Check for doneness with a toothpick: it should come out of the sponge clean and dry.

6. 6

   Remove the sponge from the pan, place it top-side down, and leave it to cool.

7. 7

   For the frosting, whip the cold heavy cream with the powdered sugar to medium peaks: start at low speed and gradually increase to medium-high. Do not whip at maximum speed, or you may overwhip the cream.

8. 8

   Whip the sour cream separately until thickened, then fold it into the whipped cream.

9. 9

   For assembly, use a cake ring or the pan in which the sponge was baked, as the frosting is unstable and may leak. In the pan, excess liquid will soak into the cake layers.

10. 10

    Trim off the top of the sponge. Cut the remaining sponge into 3 layers.

11. 11

    Spread frosting between the layers. Crumble the trimmed top and sprinkle the crumbs over the top of the cake.

12. 12

    Leave the cake to rest in the refrigerator for at least 6–8 hours.

Notes

For assembly, it is recommended to use a pan or cake ring because the frosting is not very stable. Resting time — at least 6–8 hours in the refrigerator.

Nutrition per serving

• dessert
• cake
• baking
• chocolate
• homemade baking
• with kefir
• chilled