• Heat oven to 350°F. Grease and flour two 9-inch round cake pans. Set aside.
• Stir together sugar, flour, cocoa, baking powder, baking soda and salt in a large bowl. Add eggs, milk, oil and vanilla; With a mixer, beat on medium speed for about 2 minutes. Carefully, stir in boiling water. The batter will be very thin.
• Pour batter into prepared cake pans. Bake for 30 to 35 minutes or until a toothpick inserted in center comes out clean. Cool 10 minutes; remove from pans to wire racks. Cool completely.

Chocolate Ganache 

• Place chocolate in a glass bowl. Heat heavy cream on medium high heat just until it comes to a boil. Remove from heat and immediately pour cream over chocolate.
• Wait two minutes and then stir until chocolate is completely melted and smooth (if necessary, you can microwave on 50% briefly). Cool until ganache is thickened but still thin enough to drip down the sides of the cake.
• Place one cake layer onto a cake stand or serving plate. Spread ganache in an even layer on the first layer. Top with the second cake layer. Spread ganache in an even layer on the second layer and place dollops on the edge so the ganache drips down the sides of the cake. Decorate top of cake with chocolate curls, if desired.