(Makes 7 logs, 11-12 servings each)
800g coconut (sweetened, small flake)
450g sliced almonds
70g cornstarch
700g sugar
Process until coconut and almonds are finely ground. Make a simple meringue with:
1230g egg whites
880g sugar
1 tsp salt
Move 2/3 of this mixture to a large bowl. Add the nut mixture to the remaining meringue in the mixer bowl and mix on medium until combined. Fold the meringue into the nut mixture in batches. Scale out 1000g of the mixture. Carefully spread onto well-sprayed parchment-lined sheet pans in rectangles that extend about ½ inch from the edges of the pan, taking care not to deflate or spread too thin. Bake 250F low fan 1 hour, at least. Immediately flip gently onto other sheet pans. Carefully remove the parchment. Return to the oven and bake until dry, about 15 minutes. Let cool completely.
Ganache:
50oz 54% chocolate
40oz heavy cream
10oz corn syrup
BTB cream, pour over chocolate and corn syrup in a medium bowl. Let sit 90 seconds, and whisk gently to combine. This should be enough for the center layers; you will need to make more to coat the outsides. Each layer should get about 30oz. (3 layers)
Buttercream:
32 oz whole egg
48 oz sugar
4# butter, very slightly softened
1 Tbsp vanilla extract
Combine the eggs and sugar over a double boiler. Cook over medium heat until the sugar is completely dissolved. Strain into 20qt mixer bowl. Whip on high speed until the sides of the bowl are cool, about 12-15 minutes. Add the butter gradually and whisk until the mixture comes together, about 5 minutes. Add the vanilla. Each layer should get about ___oz. (4 layers)
Assembly:
Cover 3 pieces (2 should be the bottom side, the third should be the top. This should be the second most intact piece; it will go on the very top) of dacquoise with a layer of ganache, about 30oz each. Top the fourth piece (smooth side down; try to choose the most intact piece; this will go on the very bottom) with a layer of buttercream, about 27oz. Invert one of the ganache-coated layer onto the buttercream and top that with another layer of buttercream. Repeat until all of the layers are used up and it goes like this:
Make sure the top layer of buttercream is very smooth. Refrigerate overnight until it is soft enough to slice. Trim the outside edges and cut into 7 strips 3” in width. Do not trim the other edges; they will be trimmed after glazing. Freeze until use. Place on glazing screens. Make another batch of ganache, Coat the top and long sides with a thin layer of ganache. Chill to set. When the ganache is set but still tacky, coat the sides with toasted coconut. Chill thoroughly. Trim the edges, and slice into pieces 1¼ inches wide.