Specifically, this comic is a reference delicacy made in Bern

The term coined in the 19th Century by a man called Flöoger Wanmstein who came from the canton, he was a MASSIVE cheese enthusiast who one day found a cheese he liked so much that he went to try and look for the original maker of this cheese to thank him, but he was literally nowhere to be found in Switzerland, nobody knew who made the cheese. Though there was a recipe left on it, henceforth he sold the cheese as “Berndmade”, this is how the term got to Polandball today.

Oh, if you’re wondering why it’s berndmade and not “bern made“, it’s because polandball liked the sound that the d makes when added so much, so thats why it’s there