honeycomb toffee

/HH AH1 N IY0 K OW0 M T AA0 F IY0/
noun
  1. 1

    A sugary toffee with a light, rigid, spongy texture, made with baking soda so that carbon dioxide is trapped in the viscous mixture.

Source: https://en.wiktionary.org/wiki/honeycomb%20toffee