There's something about making old recipes. They often have quirky measurements, odd instructions, or bizarre names. Take Swedish Thumbprint cookies. I somehow doubt one will find this is the national dish of Sweden. In fact, it's probably about as authentic as the Swedish Berry or the Swedish Chef.
There's also an incredible simplicity to a lot of these old standards. Four ingredients, really. It tops out at six, if you count something to roll them in and fill them with.
You can also sub out the jam for a candy of some description. Hershey's Kisses are popular. At Christmas, candied cherries cut in half add a very nice decorative touch to dessert trays.
This one is great for kids. With only a few ingredients, it is a quick recipe to make, perfect for short attention spans. And what little kid doesn't love to squish their fingers in something gooey like egg white?
A word to the wise, though. Wait until they have completely cooled off before gnashing. You will be tempted to pop the entire thing in your mouth and the sugary middle holds the heat for a long time. Take it from one who knows.