This 1956 cookbooklet from BinB Mushrooms suggests dozens of ways to incorporate more mushrooms in your diet with the help of their special butter-broiled spokesmushroom.
The front of the pamphlet shows their mushroom chef following a recipe in this very cookbook, no doubt utilizing his own savory juices (I have always admired this artistic device since first seeing a Superman's Pal, Jimmy Olsen comic book with a cover featuring Superman -or was it Jimmy?-sitting in a barber chair reading the same comic book ad infinitum).
The first page shows Mr. Mushroom attending a costume party dressed as Mr. Peanut, arm-in-arm with Miss Gourmet Magazine (I believe this is Miss Fluffy Rice underneath the costume).
Only one of the 24 pages of recipes shows our mushroom character. Here he is in stylized form lifting two shrimp barbells. Note the recipe on the left for Sweetbreads and Ham. That's what I typically serve my guests for luncheon.