Chocolate Cake with Chocolate-Orange Frosting

PreparationFor cake: Preheat oven to 350°F. Spray 9-inch diameter cake pan with 2-inch-high sides with nonstick spray. Sift all purpose flour, sugar, whole wheat flour, cocoa powder, baking soda, and salt into large bowl. Add 3/4 cup water, oil, juice concentrate, vanilla, and vinegar and whisk to blend. Transfer batter to prepared pan. Bake cake until tester inserted into center comes out clean, about 35 minutes. Cool cake in pan on rack. Carefully cut around pan sides and turn out cake onto serving platter. For frosting: Place chopped bittersweet chocolate in medium metal bowl. Set bowl over saucepan of barely simmering water. Stir constantly until chocolate is melted and smooth. Carefully transfer bowl to work surface. Cool melted chocolate to room temperature, stirring occasionally, 15 to 20 minutes. Using electric mixer, beat "butter" in large bowl until smooth. Add powdered sugar, 1 tablespoon juice concentrate, vanilla, and salt; beat until smooth. Add 2 tablespoons juice concentrate; beat until blended. Beat in agave nectar, then chocolate. Let stand 10 minutes. Frost top and sides of cake. DO AHEAD: Cake can be made up to 8 hours ahead. Cover with cake dome and store at room temperature. Also called whole grain pastry flour; available at some supermarkets and at most natural foods stores. ** A natural sweetener made from the sap of agave succulent plants; sold at some supermarkets and at natural foods stores. Test-kitchen tip:The frosting firms up quickly, so spread it over the cake shortly after you make it.Per serving: 398.8 kcal calories, 45.5% calories from fat, 20.3 g fat, 5.5 g saturated fat, 0 mg cholesterol, 58.3 g carbohydrates, 3.1 g dietary fiber, 42.9 g total sugars, 55.2 g net carbohydrates, 3.5 g protein Nutritional analysis provided by Bon Appétit

PreparationFor cake: Preheat oven to 350°F. Spray 9-inch diameter cake pan with 2-inch-high sides with nonstick spray. Sift all purpose flour, sugar, whole wheat flour, cocoa powder, baking soda, and salt into large bowl. Add 3/4 cup water, oil, juice concentrate, vanilla, and vinegar and whisk to blend. Transfer batter to prepared pan. Bake cake until tester inserted into center comes out clean, about 35 minutes. Cool cake in pan on rack. Carefully cut around pan sides and turn out cake onto serving platter. For frosting: Place chopped bittersweet chocolate in medium metal bowl. Set bowl over saucepan of barely simmering water. Stir constantly until chocolate is melted and smooth. Carefully transfer bowl to work surface. Cool melted chocolate to room temperature, stirring occasionally, 15 to 20 minutes. Using electric mixer, beat "butter" in large bowl until smooth. Add powdered sugar, 1 tablespoon juice concentrate, vanilla, and salt; beat until smooth. Add 2 tablespoons juice concentrate; beat until blended. Beat in agave nectar, then chocolate. Let stand 10 minutes. Frost top and sides of cake. DO AHEAD: Cake can be made up to 8 hours ahead. Cover with cake dome and store at room temperature. Also called whole grain pastry flour; available at some supermarkets and at most natural foods stores. ** A natural sweetener made from the sap of agave succulent plants; sold at some supermarkets and at natural foods stores. Test-kitchen tip:The frosting firms up quickly, so spread it over the cake shortly after you make it.Per serving: 398.8 kcal calories, 45.5% calories from fat, 20.3 g fat, 5.5 g saturated fat, 0 mg cholesterol, 58.3 g carbohydrates, 3.1 g dietary fiber, 42.9 g total sugars, 55.2 g net carbohydrates, 3.5 g protein Nutritional analysis provided by Bon Appétit