(1) “Kinoko no yama” is a popular chocolate snack from meiji in Japan. “Kinoko” means “Mushroom”. “Yama” means “Mountain”. Ready-made “Kinoko no yama” is put on the market. You can make your “Kinoko no yama” by this DIY kit.
(2) It cost 188 yen.
(3) Tomato chocolate is sweet but it is sour faintly. It is so tasty and I like it.
I searched online for some other variations other people have made using simple food colouring. Check out these super cute mushrooms: