Trying to find this one bl manga

There was this one manga i read on here a while back- there's a man (ML), who has a little brother or son (can't remember which), but ML can't cook to save his life- one day Ml and his kid are at the park or something and they see a salaryman eating a bun of some kind, and the kid asks for it. the romance revolves around them cooking together, I believe. sorry if this is too vague ;-;