01 - Line a large baking tray or flat surface with parchment paper to prevent sticking.
02 - Finely crush Oreos in a food processor. Transfer to a bowl and add powdered sugar, melted butter, and softened cream cheese. Mix until a thick, sticky dough forms.
03 - Place Oreo mixture between two sheets of parchment paper. Roll out to a rectangle about 1/2 inch thick.
04 - In a chilled bowl, beat heavy cream with powdered sugar and vanilla until stiff peaks form. Gently fold in food coloring until evenly tinted.
05 - Spread colored whipped cream evenly over rolled-out Oreo base, leaving a 1-inch border on the long side.
06 - Using parchment to guide, carefully roll mixture into a log starting from the long edge without the border. Seal seam side down.
07 - Refrigerate for at least 1 hour until firm.
08 - Drizzle with melted chocolate, sprinkle with Halloween decorations, and add candy eyes if desired. Slice into 1-inch servings with a sharp knife. Serve cold.