The best replacement for hot chocolate is hot cocoa.

The best alternatives to hot chocolate are rated as following:
★★★★★  hot cocoa
★★★★  coffee
★★  tea
★★  cocoa
★★  coffee caffeine
★  drinking chocolate
★  cocoa powder
★  mocha
★  milo
★  cappuccino
  coffee more caffeine
  apple cider
  coffee healthier
  hot drinking chocolate
  french vanilla
  mexican hot chocolate
  hot coco

Your alternative for hot chocolate is not listed? Suggest!
Speaking about hot chocolate, one probably shouldn't forget about cocoa powder.

Other search terms related to hot chocolate and their ratings are:

★★★★★ cocoa powder
★★★★ alcohol
★★ rum
peppermint schnapps
You have in mind a companion for hot chocolate and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of hot chocolate in all years. Click on graph for more.
hot chocolate
hot cocoa