burn something to a cinder/crisp
burn something to a crisp
to burn something totally or very badly. The cook burned the meat to a crisp.
burn to a cinder
Also, burn to a crisp. Destroy by fire; overcook. For example, If I stay in the sun too long, I'll be burnt to a cinder, or He's an awful cook-dinner was burnt to a crisp. Although both expressions can be used literally, they also function as hyperbole, as in the examples.