Prepare cake mix according to package,substitting coffee for water. Divide batter among 3 greased and floured 9" round cake pans.
Bake 20 min; or until toothpick comes out clean. let cool 5 min. Invert cakes onto cooling rack; remove from pans. let cool completely
In small saucepan over medium heat, bring 1 cup heavy cream just to a boil. Remove from heat. add choclate and let sit 2 min; stir until smooth. let cool 5 min;or until chocolate mixture is at room temperature, stirring occasionally.
Meanwhile, in a bowl on medium speed beat mascarpone cheese, confectioners sugar & remaining heavey cream for 4min; or until stiff peaks form. stir in vanilla extract.
place 1 cake layer on swrving platter, spread 1/3 cup chocolate mixture evenly over cake. Top with 1/3 mascarpone mixture, 1/2 cup rspberries and 1/4 cup mandarin oranges.
repeat layering. garnish with chocolate curls if desired