Are these knuckle sandwiches? Or finger sandwiches?
They’re intended to be finger sandwiches. :)
They are actually really easy to make, too. Instead of shaping bread after it has been cut or having to make it fresh, they used frozen dinner rolls. Simply flatten out a piece of dough into a rectangle and then cut slits into the dough where you want the fingers to be. Bake for 10 minutes or so and then fill with your favorite sandwich fillings.
These were originally made for Halloween, but I think they could work for a lot of different parties actually. For example, how about any “congratulatory” celebration where these could be offered as “high-fives”?