
Preheat the oven to 180°C / 355°F. Bring a pot of water to a gentle simmer for a water bath. Let the butter for the cream soften at room temperature, then sift the flour so it is ready to add gradually.



In a heatproof saucepan or bowl that fits over the simmering water, combine the eggs, sugar, 50-60 g butter, and honey. Whisk until the mixture is smooth and evenly blended.



Set the bowl over the water bath, making sure the bottom does not touch the water. Stir constantly until the sugar dissolves and the mixture is warm and smooth. Add the baking soda, stir until slightly foamy, then remove from the heat.



While the mixture is still warm, add the flour a little at a time, about 1/3 cup per addition. Stir with a spoon after each addition until the dough starts to thicken.


When the dough becomes too stiff to stir, turn it out onto a lightly floured surface. Knead in just enough additional flour to make a soft, elastic dough that is no longer sticky. You may need 3 to 4 cups total, depending on the flour and humidity.



Shape the dough into a log, wrap it in plastic wrap, and refrigerate for 30 minutes. This makes it easier to divide and roll thinly.

While the dough chills, make the cream. Cut the softened butter into cubes and beat it with a mixer until smooth and pale. Gradually add the sweetened condensed milk, beating until the cream is thick, smooth, and fully combined. Cover and refrigerate for 1 hour.



Remove the chilled dough and knead it briefly to make it pliable. Shape it back into a log and cut it into 6 to 8 equal pieces. Roll one piece thinly on a sheet of parchment paper, shaping it into your desired cake size. Prick the dough all over with a fork so it bakes flat.



Transfer the parchment with the rolled dough to a baking tray. Bake for 4 to 5 minutes, or until lightly golden. Repeat with the remaining dough pieces, letting each cake layer cool completely before assembly.



Take the chilled cream from the refrigerator and beat it briefly until smooth and spreadable.

Place the first cooled cake layer on a serving board or plate. Spread an even layer of cream over the top, then add the next cake layer. Continue layering cake and cream until all usable layers are stacked.



Reserve one baked layer, if desired, for crumbs. Crush it finely by hand, with a knife, or in a blender. Sprinkle the crumbs over the top and sides of the cake, then finish with grated chocolate.


Cover the cake loosely with plastic wrap, using toothpicks to keep the wrap from touching the cream if needed. Let the cake rest overnight in a cool place so the layers soften and absorb the cream. Before serving, remove the wrap, trim uneven edges if desired, and slice.






