Preparation
Preheat oven to the temperature suggested on the box
Follow the box to make the brownie batter. Mix in as many chocolate chips as you'd like (I put in maybe a full bag)
Bake the brownies until a tooth pick comes out almost clean. You want it to still be gooey, but not so gooey that it still has the consistency of batter.
Let the half-baked brownies cool, at least until you can comfortably touch them. You can let them cool down all the way, but I'm not patient enough for that.
Remove the brownies from the pan and place in a large bowl. Crumble up the brownies until you have a bowl and delicious chocolate-y crumbs.
Start adding Nutella to the bowl and mix in into the brownies. You are going to be rolling these into balls, so you want enough Nutella that the truffles are dense, but not enough that they can not hold their shape.
Once the Nutella and brownie crumbs are mixed, start rolling the mixture into balls and set on a seperate tray to cool (if you didn't let the brownies cool earlier).
This part gets messy... Roll the balls in confectioners sugar so they are completely covered. I poured the sugar into a medium bowl to make it easier to coat the Nutella balls. Before you put the sugar coated truffle back of the tray shake off any excess sugar. If you didn't let the balls cool before coating them, the sugar may start to dissolve. If this happens, just roll them in the sugar again to add another coat.