Preheat oven to 350 Spray 2 (9 - inch) cake pans with nonstick baking spray with flour; line bottoms of pans with parchment paper, and spray again.
In a medium bowl, combine sugar, flour, cocoa, baking powder, baking soda, and salt. Add half-and-half, oil, and eggs. Beat at medium speed with a mixer for 2 minutes. Reduce speed to low, and add coffee and vanilla, beating until combined. Divide batter evenly into pans.
Bake for 30 to 35 minutes or until a wooden pick inserted near center comes out clean. Remove from oven, and cool on wire racks for 5 minutes. Remove from pans, and cool completely on wire racks.
Spread about 3/4 cup Mocha Fudge Frosting onto one layer. Top with remaining layer. Frost sides and top of cake with remaining frosting. Garnish with chocolate curls if desired.