Barley sugar

Barley sugar is a traditional variety of boiled sweet (hard candy), often yellow or orange in colour, which is usually made with an extract of barley, giving it a characteristic taste and colour. In Britain it is (or was) usually sold in the shape of twisted sticks. Barley sugar is very similar to clear toy candy (which traditionally is made with pure water rather than barley water): 3  and to hard caramel candy in its texture and taste. As noted by the U.S. Food and Drug Administration (FDA) there are at least two distinct methods of preparing confections which have been called "barley sugar". Heating sugar to 160 °C (320 °F) causes it to melt and then congeal, becoming opaque on the surface due to the formation of sugar crystals. Heating to a higher temperature (185 °C or 365 °F) produces a viscid liquid, which if suddenly cooled remains transparent. The name "barley sugar" therefore does not imply one specific production method or type of candy. Candy maker Timberlake Candies further distinguishes between "barley sugar" made with cream of tartar, and "barley candy" made with corn syrup to produce a harder, clearer product.

Source: Wikipedia