I made an encounter with various mob types but I'd like a paper copy to work from while DMing? Can i print that list>?

thanks

DnDBeyond is an online digital toolset that is designed to be used in that way.   There is no built in function to print except pdfs of character sheets.

I'm sure a simple copy and paste of selected text from the encounter list to a document like Word or Google Documents would do the trick. 

You can use your browsers print option, but I suspect this won't give you the stat blocks for all the creatures in the encounter.