Crunchie is a brand of milk-chocolate-covered honeycomb toffee made by Cadbury. It was launched by J. S. Fry & Sons in 1929, and later became a Cadbury product through a corporate merger.

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Crunchie is sold in several sizes, ranging from "snack size" – a small square piece – through to "king size". The most common portion is a single-serve bar, about 1 inch wide by about 7 inches long, and about 3/4th of an inch deep.

All sizes of Crunchie chocolate bars are packaged in a gold plastic-coated foil wrapper.

As is common with many current chocolate bars, the Crunchie brand ice cream bars and cheesecake are also sold by Cadbury in some countries. Such products do not contain sponge toffee bars, but use nuggets of it within the ice cream or cheesecake.

Crunchie is widely available in the United Kingdom, Australia, New Zealand, South Africa, Ireland and Canada. It is imported in small quantities in other countries, including the United States of America

During manufacturing of the Crunchie bar, the sponge toffee is produced in large slabs, and is cut up using a highly focused jet of oil. The use of a blade would lead to fragmentation, while the use of water would result in the sponge toffee melting. Oil prevents both of these scenarios and results in uniform sharp-edged portions. The sponge toffee is then covered with chocolate, cooled, and packaged.