Copper makes the best caramel.
Copper has incredible abilities to conduct heat, which means that copper cookware can heat up very quickly and cool down just as fast. When making caramel, one of the visual cues to look for is caramel’s tell-tale amber color before cutting off the heat. Using copper pots provides more control—its heat-conducting properties means less residual cooking once the kettle is off the heat. Plus, copper distributes heat evenly, which means caramel is safe from hot spots.