固まるまでそのままにしておくか冷蔵庫で冷やしてください。

Sentence Discussions Japanese
#1
English Translation

Leave it in the refrigerator until it sets.

I think the English translation for this one is a little off

#2

@tprost

Agreed. The Japanese sentence means “Leave it at room temperature or cool it down in a fridge until it gets solid.”