How do you suppress environment variable expansion within DOS and Windows CMD?

Question

This is a simplified example with modified variable names of what I want to do. Also for simplicity sake, I am showing the command line version rather than the bat file ver

Answer 1

in a batch file, echo %%foo%% will generate %foo%.

c:\01Temp>type foo.bat
@echo %%foo%%

c:\01Temp>foo
%foo%

c:\01Temp>