"A... cake?" Yes, it is so bad looking. Anyway she's not going to tell her she barely considers it a cake, after all the young woman probably put all her effort in it. Maybe.
"Well, praticing is important too. You know, just... maybe it should be less pendant?"

Anyway she's probably going to ask you to attend private lessons to learn, at least, the basics. Because it doesn' look like a cake and you know it!

And, sorry about making you uncomfortable but Hinawa don't even know who you are and is totally unaware of your thoughs.