Once the cake is cool, carefully invert it onto a clean kitchen towel dusted with cocoa powder. Peel off the parchment paper, then spread the peanut butter filling evenly over the cake. Starting from one edge, carefully roll the cake into a log shape, using the towel to help.
Wrap the cake roll in plastic wrap and refrigerate for at least one hour. Slice and serve your delicious chocolate peanut butter cake roll and enjoy