A rich, silky slow-cooker hot chocolate made with cocoa powder and cornstarch, topped with spooky marshmallow ghosts for a festive Halloween treat.
Use low heat to prevent scorching. Whisk cornstarch thoroughly to avoid clumps. Chill mugs before serving to help ghosts maintain shape. Do not freeze hot chocolate with marshmallows inside; freeze the base only.
Keywords: Halloween, hot chocolate, crockpot, slow cooker, marshmallow ghosts, spooky drinks, winter comfort food