burn something to a crisp

US /bɜrn ˈsʌm.θɪŋ tu ə krɪsp/
UK /bɜrn ˈsʌm.θɪŋ tu ə krɪsp/
"burn something to a crisp" picture
1.

to burn something so much that it becomes very dry, hard, and often black

:
I left the pizza in the oven too long and burned it to a crisp.
The toast was burned to a crisp, completely black and inedible.