In large mixer bowl, combine cake mix, whipped topping mix,
eggs and 1 cup cold Concord grape juice. Blend until moistened.
Beat 4 minutes at medium speed.
Pour into greased and floured 10-inch tube pan.
Bake at 350°F. for 45 minutes or until cake tests done.
Cook in pan 15 minutes. Turn out onto wire rack.
Using metal skewer or straw, poke holes in surface of cake.
Carefully spoon remaining 1/2 cup grape juice onto cake
until it is absorbed. Cool cake.
Sprinkle with confectioners' sugar before serving.