How to escape the `@` variable replacement in `forfiles`?

I am using a forfiles command line like this (Windows 7 x64):

forfiles /P "C:\root" /M "*.txt" /C "cmd /C echo @relpath"

How can I escape the replacement of @relpath (relative path to currently iterated item) to get @relpath output literally? (...or any other @ variable?)

So far I tried the following things, without success:

• \: the @ seems to be handled before \ so \@relpath does not work, rather the expanded output is just preceded with \;
• ^: stating ^@ does not show any effect except that the ^ disappears; writing ^^@ does not help eigher, one ^ remains in the expanded output then;
• 0xHH: surprisingly (to me), the forfiles-specific replacement of hexacecimal numbers 0x40 does not work either, it seems that this is done prior to variable parsing;
• @@: doubling the @ keeps the first @ literally, that is it;

I just found an even easier method:

forfiles /P "C:\root" /M "*.txt" /C "cmd /C echo @^relpath"

Note the ^ after the @ sign.