Curdled or soured (referring to milk that has naturally thickened and separated into curds and whey).
Past participle of clabber, used as an adjective. The -ed suffix indicates a completed state or condition.
In Appalachian and Southern cooking, clabbered milk is still treasured for making cornbread and biscuits with a particular tang—it's regional food knowledge that's being rediscovered by modern chefs.
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