- Any food that its taste will be of lesser quality if done before Yom Tov.[1] [This applies even if it can be placed in a fridge to help retain its fresh taste.[2] If, however the food will taste just as good if placed in the fridge, and one is eating the food cold, then some Poskim[3] rule it must be made before Yom Tov.]
- Any food that would receive a degrading change in color if done before Yom Tov.[4]
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[1] Admur 595:5; Rama 595:1; All Poskim ibid
[2] Beir Moshe 8:225; SSH”K in introduction; Piskeiy Teshuvos 495:5 in name of Rav Elyashiv; See Nitei Gavriel 2:2 footnote 2
The reason: As even food that is placed in a fridge loses some quality of taste. [Beir Moshe ibid] As one is not required to perform any actions to help preserve the taste. [Piskeiy Teshuvos ibid]
[3] Beir Moshe 8:224; See Piskeiy Teshuvos ibid
[4] Piskeiy Teshuvos 495:4