The essential tip to give your cake roll the perfect texture is to roll it while it's still warm.
After baking your cake in a jelly roll pan and removing it from the oven, immediately loosen the edges of the cake from the pan using a knife or spatula.
Then, place a clean kitchen towel on a flat surface and dust it lightly with powdered sugar.
Carefully invert the warm cake onto the prepared towel and peel off the parchment paper or silicone mat from the bottom of the cake.
Starting from one short end, gently roll the cake and the towel together into a tight spiral.
Allow the rolled cake to cool completely while wrapped in the towel. Rolling the cake while it's still warm helps to set its shape and prevents cracking later on.
Once the cake has cooled, carefully unroll it, fill it with your desired filling, and roll it back up again.
This technique ensures a soft, flexible cake roll with a perfect texture every time.