Chocolate balls (made of cocoa powder, butter, sugar and rolled oats) are a traditional Swedish sweet. Super easy to make, and (done right) quite delicious. For an adult version, add some espresso and rum. The one in the photo is a kids’ version: Adrian and his friends rolled their own chocolate balls during his birthday party on Sunday. Some of the boys made bite-sized balls; other balls were nearly fist-sized. The last and largest one we cut in two for Adrian and Ingrid to share.