Page 10 is so good...
Although I'm not sure the powaaaan sound effect really should be innocent, it's more of a warm feeling
it even has the onsen symbol
They were eating a yule log (roll cake). It even had the classic roll cake shape and stump frosting on top, and decorated with little santas and holly leaves to signal it further as being a yule log. Even if it really said "tree stump candy"/tree stump okashi or some such in japanese, that is way too literal a translation into English