Step 1
Preheat your oven to 160°C (320°F). Sift the flour and cocoa powder together. In a separate bowl, whip the butter with the granulated sugar until the mixture becomes light and fluffy. Add the egg yolks and mix well. Gradually incorporate the dry ingredients into the butter mixture and knead the dough until smooth.
Step 2
Place the dough between two sheets of parchment paper. Roll it out to your desired thickness and refrigerate for at least 30 minutes. Once chilled, transfer the dough to a baking sheet and bake for 15-20 minutes or until the edges are set and slightly golden. Allow it to cool completely. Ensure your butter is at room temperature for easier whipping.
Step 3
Defrost the cherries and blend them into a puree. Pass the puree through a sieve to remove any solids. You should have 180 grams (6.35 ounces) of smooth puree. In a small bowl, combine sugar #3 with the pectin. Heat the cherry puree in a saucepan until it starts to steam lightly. Add the sugar and pectin mixture and bring to a boil for 3 minutes. Remove from heat and refrigerate for 2 hours. Use a digital thermometer for accuracy when boiling.
Step 4
After chilling, whisk the cherry puree on medium speed for 3 minutes, gradually adding sugar #1. Once all the sugar is incorporated, increase the mixer to high speed and whip for an additional 5 minutes. In a separate saucepan, combine water, narsharab sauce, and agar. Bring to a boil. Simultaneously, measure out sugar #2 and glucose syrup. After 8 minutes of whipping the puree, add the egg whites and whip on high speed. As soon as the egg whites are incorporated, boil the syrup (water, sugar, glucose syrup) to 110°C (230°F). Continue cooking for another 4 to 5 minutes. Pour the syrup into the cherry puree mixture and whip for 2 more minutes. Having all your ingredients pre-measured will make the process smoother.
Step 5
For the cherry confit, defrost and halve the cherries. Place them in a saucepan with narsharab sauce over medium heat. Mix the sugar with pectin and agar in a small bowl. Once the cherries begin to steam, add the dry ingredients. Boil the mixture for 2 to 3 minutes, then stir in the lemon juice. Refrigerate the confit. For an enhanced flavor, add a splash of almond extract to the cherry confit.
Step 6
In another saucepan, bring the heavy cream and milk to a light steam. In a bowl, whisk the egg yolks with powdered sugar until light and pale. Gradually pour the warm milk mixture into the egg yolks, whisking constantly. Return the mixture to the saucepan and cook over medium heat, stirring continuously until thickened. Strain the mixture over the dark chocolate and stir until smooth. Add the butter and blend if necessary. Cover the surface with plastic wrap and refrigerate. Make sure to keep stirring the milk mixture to avoid scrambling the eggs.
Step 7
To assemble the cake, use a ring mold lined with acetate film. Spread a small amount of marshmallow at the base, followed by the shortbread base. Add a thin layer of marshmallow, creating a ring. Fill the ring with cherry confit and cover with another layer of marshmallow. Add a ring of chocolate crème. Repeat the layers if desired. Allow the cake to stabilize at room temperature for 2 to 3 hours, then refrigerate for 5 to 6 hours. Assembling the cake in a ring mold helps maintain its shape.
Step 8
For decoration, prepare an additional portion of marshmallow. Using a piping nozzle, decorate the cake with marshmallow and place the remaining cherry confit in the center. Let the cake sit at room temperature for a couple of hours before refrigerating again. Use a star tip nozzle for a beautiful decorative effect.
Step 9
After allowing the cake to set for the recommended time, your delicious cherry chocolate cake is ready to be enjoyed! For an extra touch, dust with cocoa powder or powdered sugar before serving.