A round, flat sweet-potato bread cooked on a hot basalt stone rather than in an oven, split while still hot and filled with garlic butter until it soaks through. Funchal's default side dish and its default snack.

The name comes from the caco, the flat stone disc the bread is baked on, not from any shape of loaf. Sweet potato was a cheap and abundant crop on Madeira's terraces, and mashing it into the dough made a soft bread that stayed edible for days without an oven, which most rural households did not have. The garlic butter is a later addition and now inseparable from it. In Funchal the bread arrives before you order, is used to mop the drippings under an espetada, and is sold split and filled as a street snack.

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