I'm almost with gamache on this one, if it's not something you need to do often in the program, or if you don't have the access/ability to install the File:Path module, then doing 'mkdir -p' in a "perlish" way might be even easier (considering you're in a Unix environment):

$path = "/path/to/real/deep/folder";
$out = `mkdir -p $path 2>&1`;
die "Can't make path: $out\n" if ($? > 0);
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