Chocolate Cake:

2 cups all-purpose flour
2 cups granulated sugar
3/4 cup Dutch-processed cocoa powder sifted
2 tsp baking soda
1 tsp baking powder
1 tsp salt
1/2 cup vegetable oil
1 cup buttermilk room temperature
1 cup hot water
2 large eggs room temperature
2 tsp vanilla

Chocolate Swiss Meringue Buttercream:

5 large egg whites
1 1/2 cups granulated sugar
1 1/2 cups unsalted butter room temperature
8 oz good quality dark chocolate chopped, melted, cooled*

Assembly:

chocolate curls or sprinkles