Maderized wine, says Melanie Wong, refers either to wine that has been oxidized, or wine that has been affected by oxygen in combination with heat. Like, say, opened, and then stuck in the trunk of your car on a hot day.
Wine that has merely been exposed to air is fine for making vinegar, but wine that has been heat-blasted and oxidized is “best used as a drain cleaner,” says Will Owen. Maderized white may be fine for cooking, says mpalmer6c. In small amounts it’s probably not toxic. And it can work as a braising medium for meats, says mtl to tor. You just definitely don’t want to drink a glass of it.
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