3/4 Cup (1 1/2 Sticks) Unsalted Butter, Melted, Cooled
1/2 Cup Sour Cream
1/2 Cup Grated Raw Beets
FROSTING:
1 Cup Whipping Cream
14 oz. Bittersweet or Semisweet Chocolate, Chopped
2 Tbl. Light Corn Syrup
FOR CAKE: Preheat oven to 350 degrees F. Butter 10-inch-diameter cake pan with 2-inch-high sides. Line bottom with parchment; butter parchment. Sift flour, sugar, unsweetened cocoa powder, baking powder, salt and baking soda into large bowl of electric mixer. Add buttermilk, eggs and vanilla extract and beat until blended. Mix in 3/4 cup melted butter and sour cream. Stir in grated beets. Pour batter into prepared pan. Bake until toothpick inserted into center of cake comes out cleat about 65 minutes. Transfer to rack and cool 10 minutes. Turn and take out onto rack and cool completely.
FOR FROSTING: Scald whipping cream in heavy medium saucepan over medium heat. Remove from heat. Add chopped chocolate and stir until melted and smooth. Mix in light corn syrup. Transfer to medium bowl. Refrigerate frosting until just spreadable (about 15 minutes).
Cut cooled cake into 2 even layers. Spread top of cake layer with 1/2 cup frosting. Top with second cake layer. Spread top and sides with remaining frosting. (Can be prepared 1 day ahead. Cover with cake dome and store at room temperature)