Grind the sandwich cookies and transfer them in a deep bowl. Add the melted butter, vanilla and cocoa and form a mixture that you will place on the baking paper on the work surface. Place another baking sheet on top of it and roll out a half-cm thick crust. In another deep bowl, whisk the whipped cream with the milk and add the gelatin diluted and steamed. Stir well, then add finely chopped jelly candies to the mixture. Spread the crust and carefully make a roll. With the help of baking paper, fasten the roll and leave it in the refrigerator to harden for about 3-4 hours. Cut into pieces and enjoy.