Just in case May should pass and @odevices need some palatable ideas in the preparation of hat, I’m offering the following and hope others might contribute some tasty recipes that could make it easier to consume said hat. Here’s mine found on an eating hat website:
Capcakes
Take 1 knit watch cap and wash in extremely hot water until it shrinks to the size of a tennis ball.
Insert 1 handful of angelfood cake inside the hat.
Insert 2 tablespoons of your favorite jam or jelly.
I’m wondering if it’s possible to buy pre-fermented hats in Japan, all the while my dinner is cooking. I’m hungry from work and the whole thing is getting mixed up in my mind. I can almost smell the delicious hats.
I’m trying to focus here. 
