Line a 2-qt. bowl with plastic cover. Slice each cake roll into eight pieces; keep it in prepared bowl, entirely covering the bottom and sides. Wrap and freeze for 20 minutes or until cake is stiff.
Add vanilla ice cream over cake. Wrap and freeze for at least 1 hour. Spread with fudge topping. Freeze it for 1 hour. Spread with chocolate ice cream. Wrap and freeze for up to 2 months. Just before serving, take away from the freezer and invert onto a serving plate. Eradicate bowl and plastic cover. Slice into wedges and serve.