German Chocolate Cake

Preheat the oven to 350°F. Grease and line three 8” cake pans with parchment paper. Set aside.
Place the chocolate pieces in a medium bowl and pour over the boiling water. Add the instant coffee, if using. Let stand 1 minute; whisk together until the chocolate is melted and set aside to cool.
In a large bowl, whisk together the flour, baking soda, and salt. In the bowl of an electric mixer, beat together the butter and sugar until light and fluffy. Add the egg yolks, 1 at a time, beating well after each addition. Stir in the cooled chocolate mixture and vanilla extract. Add the flour mixture to the creamed mixture alternately with the buttermilk (begin and end with the flour mixture).
In a separate bowl, whip the egg whites with an electric mixer on high speed until stiff peaks form. Gently fold half of the egg whites into the batter to loosen it using a large rubber spatula. Fold in the remaining egg whites. Divide the batter between the prepared pans.
Bake for 30-35 minutes, or until a toothpick tester inserted near the centers of the cakes comes out clean. Immediately run a knife between the cakes and sides of the pans. Let cool 15 minutes. Remove the cakes from the pans and peel away the parchment paper. Cool completely on wire racks.

In a medium saucepan, combine the milk, sugar, butter, egg yolks, and vanilla. Cook on medium heat while stirring occasionally.
When the butter is melted, cook for approximately 12 minutes whisking constantly, or until the mixture thickens and turns golden. Remove from the heat.
Place the coconut and pecans in a large bowl. Pour the cooked mixture over them and stir to combine. Cool to room temperature and of desired spreading consistency.

Place the chocolate and heavy cream in a microwave-safe bowl. Microwave at 100% power for about 1 minute 30 seconds. The cream should be steaming upon removal from the microwave. Let the mixture stand for about 60 seconds, then whisk together to combine. You can leave the ganache at room temperature to thicken. Or refrigerate it – checking and stirring it often- until spreading consistency.

Place a cake layer on an 8” cake board, a cake stand, or serving plate. Scoop 1/3 of the coconut-pecan frosting on top; spread as evenly as possible. Use a spoon or an offset spatula to push the thick frosting into place. Top with a second cake layer and repeat frosting. Top with the third cake layer and spread on the remaining coconut-pecan frosting. (At this point, you could serve the cake without the ganache covering.)
Spread a crumb coat of the cooled and thickened ganache on the sides of the cake. Refrigerate 15 minutes; add a second even coat to the sides. Immediately press chopped pecans into the bottom edge of the cake. Transfer any leftover ganache to a piping bag fitted with a small closed star tip, and pipe a shell border around the top edge (this is optional but pretty). Sprinkle any leftover chopped pecans on the shell border.
Line pecan halves within 1/2 inch of each other around the top edge of the cake.
Store the cake at room temperature in an air-tight cake keeper, or tightly under plastic wrap for up to 4 days. Or, to prolong freshness, store in the refrigerator for up to 7 days. Bring slices of cake to room temperature before serving.