Festive Chocolate Torte Cake Recipe

Beat butter and sugar in large bowl with electric mixer on medium speed until light and fluffy. Add eggs, chocolate and vanilla; beat until well blended. Add combined flour, baking powder and salt alternately with milk, mixing well after each addition. Pour into prepared pan.
Bake until toothpick inserted in center comes out clean. Run knife or metal spatula around pan to loosen sides; invert onto wire rack. Carefully remove wax paper; cool completely. Cut cake crosswise into 3 (10x5-inch) rectangles.
Frost 2 of the cake layers with half of the whipped topping; stack on serving plate. Top with remaining cake layer. Spread top of cake with pie filling. Frost sides of cake with remaining whipped topping. Store in refrigerator.