Honeycomb is believed to be invented in 1940's, but its history is quite vague as well as the original recipe. This sugary toffee, a light, rigid, sponge-like texture is known by a variety of names all over the world. According to Wikipedia: Cinder toffee in Britain referring to brittle treacle toffee.

When was honey comb invented?

The Buzz About Honeycomb

Introduced in 1965, Honeycomb is a classic Post cereal. Honeycomb fans have loved the original shape and one-of-a-kind taste of the cereal for over 50 years. Made with corn, oats, and real honey, this cereal is a great option for breakfast or as a snack.

Where did honeycomb toffee originate?

The Sunderland Daily Echo and Shipping Gazette' for Saturday 28 July 1951 (p2) says that "Cinder toffee [is] said to come from Prudhoe", and it does seem to be the case that most early receipts are from North Eastern England or Southern Scotland. The chocolate-coated 'Crunchie Bar' was launched in 1929 by J. S.