barley sugar
US /ˈbɑːrli ˌʃʊɡər/
UK /ˈbɑːrli ˌʃʊɡər/

1.
a type of hard, clear candy, traditionally made with barley malt extract, giving it a distinctive flavor and often shaped into twisted sticks
:
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She offered him a piece of barley sugar from her purse.
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The old-fashioned sweet shop sold various kinds of barley sugar.