Heat the milk, whisking in cocoa powder, vanilla, and sugar until combined over medium low heat for 5 minutes, whisking occasionally until combined and warm. Cool for 5 minutes.

Using a whisk or fork and bowl, or blender, combine the buckwheat flour, salt, butter, eggs, and warm cocoa milk together until smooth. Transfer to a bowl. Cover and chill the batter for at least 2 hours, or preferably overnight.

When ready to make the crepes, whisk 1/2 cup water into the batter. Place a large dinner plate or sheet pan on the stovetop next to where you will be cooking.

Place the cream and California Mission Figs in a small saucepan set over medium low heat, for about 5 minutes. Tumble the chopped chocolate or chocolate feves into a medium sized bowl. Place a strainer on top of the bowl and pour the cream through the strainer onto the chocolate below. Ignore the cream and chocolate for 3 minutes. Transfer the figs from the strainer to a food processor along with the salt and hazelnuts. Stir together the cream and chocolate until smooth. Then, transfer to the food processor. Process until smooth.

Place a crepe on a cake stand or whatever surface you plan on presenting it. Select your 20 best crepes. Using an offset spatula, spread about 2 tablespoons evenly across the crepe. Top with another crepe. Continue the crepe and ganache layers until you’ve used up all the crepes. Dollop and spread the rest of the ganache on top of the cake. You can scatter chopped toasted hazelnuts on top or slices of dried mission figs. Chill for 2 hours before serving.