The Garibaldi biscuit consists of currants squashed and baked between two thin oblongs of biscuit dough—a sort of currant sandwich. The biscuits are similar to Eccles cake as well as the Golden Raisin Biscuits once made by Sunshine Biscuits.

Popular with British consumers as a snack for over 150 years, the Garibaldi biscuit is conventionally consumed with tea or coffee. In the United States, the Sunshine Biscuit Company for many years made a popular version of the Garibaldi with raisins which it called "Golden Fruit".

When bought in supermarkets in the UK, Garibaldi biscuits usually come in four strips of five biscuits each. They have a golden brown, glazed exterior and a moderately sweet pastry, but their defining characteristic is the layer of squashed fruit which gives rise to the colloquial names fly sandwiches, flies' graveyards, dead fly biscuits, or squashed fly biscuits, because the squashed fruit resemble squashed flies.

The Garibaldi biscuit was named after Giuseppe Garibaldi (4 July 1807 – 2 June 1882), an Italian general and leader of the struggle to unify the Kingdom of Italy. He is considered one of the greatest generals of modern times and one of Italy's "fathers of the fatherland". Garibaldi is also known as the "Hero of the Two Worlds" because of his military enterprises in South America and Europe.

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