When to candy has reached the proper temperature, remove it from the heat and quickly stir in the baking soda. It should start to foam up a lot!
When the baking soda is thoroughly incorporated, spread out onto waxed paper or buttered foil and spread.
Allow it to cool and harden completely, then break into chunks.
Store candy in a super air-tight container. Honeycomb candy is hygroscopic, meaning it takes in moisture from the air. Unattended candy will get sticky quick! Another great way to prevent this is to coat the pieces in chocolate - yum!