Florentine biscuit (or simply, Florentine) is a sweet biscuit of nuts and fruit.
It was most likely invented in France in the 17th century and not in Italy (despite their name).
[1] Florentines are made of nuts (typically hazelnuts and almonds) and candied cherries mixed with sugar melted together with butter and honey, cooked in an oven.
They are often coated on the bottom with chocolate, which is traditionally scored in a wave pattern with the tines of a fork for decoration.
Media related to Florentine (biscuit) at Wikimedia Commons