Preheat the oven to 350 degrees.
Open and unroll the first crescent dough sheet on a piece of parchment paper. Fold it in half to create a square. Gently roll out and tug the dough until you can cut a 9 inch circle from it. Repeat with the other two sheets of crescent dough so you have 3 dough circles, each on a piece of parchment paper.
Microwave the Nutella for 7 seconds to loosen it up. Spread half of it on one dough circle, stopping half an inch before the edge. Top with a second dough circle. Spread the remaining Nutella, then top with the third dough circle.
Press a small cup into the center of the top dough to create an indent. Starting at the indent, cut outward to divide the dough into 4 pieces, connected in the middle. Cut each quarter into 4 again, so you have 16 wedges.
Pick up two adjacent pieces and twist them away from each other twice, then pinch the edges together. Move to the next two pieces and repeat, continuing all the way around. Slide the parchment paper onto a baking sheet.
Bake for approximately 24 minutes until top is golden brown and crescent dough seems cooked through. Cool 30 minutes before dusting with powdered sugar, if desired. Serve immediately. Bread tastes best the same day. Leftovers can be stored at room temperature.