Favorite food

The main character's favorite food is a reoccurring theme in the series, appearing on all of the initial naming screens. In all of the games, it is cooked by the respective main character's mother. It is not an actual inventory item, however, and is merely mentioned in text.

In
The favorite food is referenced very little in, being served by Ninten's mother and in Magicant, with a couple of NPCs mentioning it. Unlike the other two games, there is no canon default for it, and so the favorite food is completely up to the player. When eaten, it restores the party's HP and PP completely.

In EarthBound
Similar to the first game, in EarthBound it is served by Ness's mother. Paula's mother also learns to prepare it as well, although she mentions that she's only just learning and still needs to practice. When eaten, it restores the party's HP and PP completely. In the letter at the end of the game, in the letter from Ness's mother, she mentions that they haven't been eating the favorite food as much lately.