Steam has plenty of online multiplayer PC games, but the platform is not lacking in great local co-op titles either. Couch co-op and split-screen tend to be associated with consoles as the terms conjure
of friends playing Mario Party and Crash Team Racing on a TV, but PC owners have plenty of options as well.
Download Parsec for free and install it. Head to the Parsec Arcade, and choose to host Overcooked (this will only work if Overcooked is already running). Share the big link with your friends. Your friends will be asked to download Parsec too, and once they have, you'll be ready to play together.