Having some issue with understanding how crafting works and also what does the smiley & sad face on the tea stove means?
I'm trying to craft Tea with Matcha, but wasn't able to:

It looks like the tea in your picture already has an ingredient mixed in. You can tell because there is a place under it.
The smiley face stoves produce Energy tea while the sleepy face stoves produce Relaxing tea.
I know a lot of the mechanics are not super clear. First thing I would update is the tutorial and explain what each symbol means.