Phosphorescent Calavera Cake

Ingredients

• 170 g Egg whites (separated from yolks)
• 210 g Egg yolks
• 240 g Granulated sugar
• 140 g All-purpose flour (sift before use)
• 330 g Fresh mango (peeled and diced)
• 50 g Sugar (compote)
• 2 g Pectin H (powdered pectin)
• 1 c. à café Espelette pepper (optional, adds gentle warmth)
• 165 g Heavy cream (very cold)
• 30 g Sugar (whipped)
• 120 g Mascarpone
• 2 Vanilla beans (seeds scraped)
• 200 g White chocolate (for tempering)
• 300 g White marzipan or fondant (rolled 1‑2 mm thick)
• 50 g Egg whites (royal icing)
• 330 g Powdered sugar
• 15 g Lemon juice (about 1 tbsp)
• quantité selon besoin Phosphorescent food coloring (used only for decoration, not edible)

Instructions

1. Prepare the ladyfinger sponge

   Whisk the egg whites to stiff peaks in the mixer bowl. When they become foamy, add the sugar in three additions while continuing to whisk until the whites are firm.

   Time: PT5M

2. Incorporate the yolks and flour

   Pour the egg yolks in a single stream while whisking at low speed. Sift the flour and fold it in gently with a spatula, lifting the mixture to keep it from falling.

   Time: PT4M

3. Bake the sponge

   Pour the batter into a 25 cm cake pan that has been buttered and floured, place on a baking sheet and bake at 190°C for 25 minutes.

   Time: PT25M

   Temperature: 190°C

4. Cool the sponge

   Remove the sponge from the oven, let cool to room temperature, then remove the pan.

   Time: PT15M

5. Prepare the mango compote

   Peel the mangoes, dice them. Cook 230 g of diced mango in a saucepan over medium heat, stirring constantly until a compote consistency is reached.

   Time: PT5M

6. Add sugar, pectin and pepper

   Sprinkle the sugar‑pectin mixture over the mango in a shower, continue cooking a few minutes, then fold in the remaining mango dice and the Espelette pepper. Mix briefly.

   Time: PT10M

7. Cool the compote

   Transfer the compote to a container, cover and refrigerate until completely cooled.

   Time: PT30M

8. Prepare the vanilla mascarpone whipped cream

   In a very cold mixer bowl, whisk the mascarpone with the sugar and vanilla seeds until a smooth mixture forms. Gradually add the heavy cream while whisking until a firm whipped cream is achieved.

   Time: PT5M

9. Refrigerate the whipped cream

   Covered, place the mascarpone whipped cream in the refrigerator until assembly time.

   Time: PT10M

10. Cut the sponge into a calavera shape

    Place the cardboard calavera template on the sponge, cut the outline with a thin knife, remove the excess and split the sponge into two equal layers.

    Time: PT10M

11. Assemble the cake

    On the lower half of the sponge, spread a generous layer of mascarpone whipped cream over the entire surface, then pipe a border of whipped cream along the edges. Spoon the mango compote in the center, place the second sponge half on top, and cover completely with whipped cream.

    Time: PT15M

12. Refrigerate the assembly

    Place the assembled cake in the refrigerator for at least 20 minutes to firm up the whipped cream.

    Time: PT20M

13. Prepare the marzipan and cover the cake

    Roll out the white marzipan between two sheets of parchment paper to 1‑2 mm thickness. Lay the first sheet over the cake, then remove the second sheet and reposition it to wrap the cake. Trim the excess with a knife.

    Time: PT10M

14. Temper the white chocolate

    Melt the white chocolate in a bain‑marie following the temperature curve (45°C, then cool to 27‑28°C, then raise to 31‑32°C).

    Time: PT10M

    Temperature: 45°C

15. Roll and cut the mask

    Pour the tempered chocolate onto a sheet of parchment paper, roll to 2 mm thickness with a rolling pin. Let it set at room temperature (about 1 h). Once semi‑solid, cut the calavera mask using a scalpel and the cardboard template.

    Time: PT15M

16. Prepare the phosphorescent royal icing

    Whisk the egg whites with half of the powdered sugar until a fluffy mixture forms. Add the remaining powdered sugar and lemon juice, whisk until a pliable but not liquid consistency is reached.

    Time: PT5M

17. Color the icing

    Divide the royal icing into several small bowls, add the phosphorescent food coloring (a small pinch is enough) and mix until a uniform color is achieved.

    Time: PT5M

18. Decorate the cake

    Fill a piping bag with the colored icing and create designs (flowers, scrolls, geometric shapes) on the white chocolate mask placed on the cake.

    Time: PT10M

19. Apply the white chocolate mask

    Gently place the cut mask on top of the marzipan‑covered cake. Press lightly to set.

    Time: PT5M

20. Reveal the phosphorescence

    Turn off the lights, switch on the UV lamp and admire the phosphorescent glow of the mask.

    Time: PT2M

Nutrition Facts

Calories

520

Protein

6 g

Carbohydrates

70 g

Fat

20 g

Fiber

2 g

Ingredient Substitutions

• Instead of Egg whites: reconstituted powdered egg whites
• Instead of Egg yolks: liquid egg yolks in a carton
• Instead of Granulated sugar: cane sugar
• Instead of All-purpose flour: wheat flour
• Instead of Fresh mango: fresh pineapple
• Instead of Pectin H: agar-agar (adjusted amount)
• Instead of Espelette pepper: Cayenne pepper (less aromatic)
• Instead of Heavy cream: whipped cream
• Instead of Mascarpone: cream cheese (different texture)
• Instead of Vanilla beans: vanilla extract
• Instead of White chocolate: white milk chocolate
• Instead of White marzipan or fondant: white fondant
• Instead of Phosphorescent food coloring: regular food coloring

Equipment Needed

• Electric mixer
• Mixing bowl
• Rubber spatula (silicone spatula)
• 25 cm round cake pan
• Baking sheet
• Cooling rack
• Saucepan
• Kitchen thermometer (optional)
• Rolling pin
• Parchment paper sheets
• Chef's knife
• Scalpel or thin knife
• Piping bag and tips
• UV lamp (optional)
• Cardboard calavera template

Critical Steps — Do Not Skip

• Whisk egg whites to stiff peaks
• Properly temper the white chocolate
• Precisely cut the white chocolate mask
• Use phosphorescent colorings only for decoration (non‑edible)
• Refrigerate the assembly before applying the marzipan and mask

Chef Tips from the Video

• Sift the flour to avoid lumps in the sponge.
• Use a piping bag with a fine tip for detailed icing designs.
• For a more intense phosphorescent effect, expose the cake to UV light for 5 minutes before darkness.
• Lightly dust the cake edge with powdered sugar before applying the marzipan for a cleaner finish.

Troubleshooting

Storage

Refrigerator: Store in the refrigerator, covered, up to 2 days.

Freezer: The whole cake can be frozen, tightly wrapped, up to 1 month. Thaw in the refrigerator before serving.

Room temperature: Consume promptly; the cake does not keep at room temperature for more than 4 hours.

Make-Ahead Tips

• Bake the ladyfinger sponge the day before and store in an airtight box.
• Prepare the mango compote 24 h ahead and keep refrigerated.
• The mascarpone whipped cream can be whisked the day before and kept chilled.
• The white chocolate mask can be tempered and cut 1 day ahead, then stored in the refrigerator.