Word of God puts his food at Impossibly Delicious Food levels since he has 100% success rate for all steps and is good at pushing the recipe ahead just so to be perfect. Shima actually says (in the manga) that "it's truly a taste which wouldn't be put to shame no matter which family you marry into." while in the anime Konekomaru says "you'd make a good wife".
She's in the middle ages, meaning there's no culture of professional restaurants or particularly advanced recipes. While Maine's food is considered extremely good, this is only a relative thing. Played with in Ascendance of a Bookworm.
His baked goods win over everyone that tries them, and the head of Anpanman himself is the tastiest food in the series thanks to him. However, the number one supreme chef in the series is Uncle Jam. Multiple episodes are themed around two of these characters arguing about who's food is the best. As multiple characters in Anpanman are food-based characters, any character with a food theme of prepared food or meal is the master of making that kind of food.Nene in The Ambition of Oda Nobuna can make grass into a delicious meal.The main character Taisuke from Alive: The Final Evolution is an incredible chef considering the dishes he makes while on the road.She was also able to make a decent cook out of Sora Hasagawa, whose nickname was "Chef Assassin". It should also be noted that Belldandy doesn't use her magic in the kitchen, preferring the hands-on approach to make it more special. Her fellow goddess, Peorth, is no slouch, either. Belldandy from Ah! My Goddess excels at cooking.