Preheat oven to 350 degrees. Grease and flour bundt cake pan and make cake mix according to directions on box. When done cool and slice cake horizontally, making a total of 4 pieces. This will give you 3 layers. Note: cake does not have to cut, but this would only give you 1 layer of cream in the center.
FOR CREAM: In large mixing bowl whip heavy cream until peaks form.
Add mascarpone cheese and white frosting, mix well but do not overbeat. Add red food coloring until you reach desired color.
Start layering cake by placing first piece of cake onto your serving platter; frost. Repeat layers. I protect bottom edges with torn pieces of wax paper that later will be removed. This will keep your plate clean while frosting.
Add raspberry flavor to chocolate frosting, mix well.
Frost sides of cake with chocolate frosting, sealing cut edges. Microwave any leftover frosting to drizzle over top of cake. (Add drops of milk to loosen, if needed.) Chill to set frosting. Remove wax paper. Before serving add raspberries to center of cake and around edge. Garnish with mint leaves.