今まではまんじゅうみたいなものを食べる絵しかなかったが、

今回は料理をしているように見える。

あのまんじゅうを作っているところなのかもしれない。

Up to this point, there were only pictures showing them eating things that look like steamed buns, but this time they seem to be cooking.
Perhaps this is them creating those steamed buns.