I am not sure if this is beyond the scope of this sub but I recently had these for the first time when a friend came back from a trip to Japan. And needless to say, I am absolutely obsessed. They don't seem to be available for purchase here and with their seemingly relative simplicity, I was hoping that maybe someone here would have suggestions for how to make something similar!

I was getting graham cracker vibe but of course its different. I read the manufacturer page and tried to get some info on how its made and the filling is the trickiest part. Though I'd be happy to just recreate the cookie on its own as I found that part to be the most delicious