Frozen food on Shabbat

Hi,

Food that is frozen is not automatically muktzeh on Shabbat; when Shabbat started, there was sufficient time to thaw and use it on Shabbat. However, food which one specifically freezes before Shabbat, planning to use it on a later occasion, is rendered muktzeh due to one's intent.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 5:22:35)

Have a  great day,
Mordechai