I was trying to find the molds for these cookies - I think they’re also called ‘Krokaner’ - but it’s very hard to find the forms in the US, and we’ll have to remember your ingenuity.
(There’s a German cake called ‘Rehruecken’ that is made in a sort of half-cylinder pan that might work for the cookies.)
Good old Apple Kuchen works good in any pan, just do the toothpick test.
I substitute apple sauce for the water, used granny Smiths on the Top and drizzle sour cream Dutch German design over that.
When the sour cream begins to brown you turn it down and test again with the toothpick