system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are bubble chocolates like Aero made? What gives the inside that bubble texture?
gpt
They pump gas through liquid chocolate until it's basically a foam so when the chocolate sets it's full of bubbles.

Wikipedia says they use Nitrogen, Argon, Carbon Dioxide or Nitrous Oxide but not Oxygen as it will make the chocolate rancid.