Line a 10×15 cookie sheet with dull side of foil or wax paper. Grease the foil or wax paper.
While cake is baking, you will need to take a clean kitchen towel and lay it flat on the countertop.
When the cake is finished baking, you will immediately turn over the baking sheet onto the towel.
Remove the foil or wax paper. Now LOOSELY roll the cake up in the towel. Let the cake cool for about an hour or two.
After the cake has cooled, unroll it. Get out your completely frozen ice cream. DO NOT THAW your ice cream.
Using a large knife, slice the ice cream. Place the slices onto your cake. Leave a little space in between the slices.
Try to let it freeze for a few hours before serving. It tastes best when the cake is frozen, too.