“Dough”:
The day before cooking, bake a chocolate sponge cake (your favorite) and leave it to dry without covering.
I baked it myself, I will give a link to the recipe under the bottom large photos.
Cut the biscuit into pieces.
P.S. for this recipe, we will need half a portion of this biscuit, so you can bake half, or you can completely, and freeze the other half.