Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
Unroll the crescent dough and separate into 8 triangles.
Place 1 teaspoon of Nutella at the wide end of each triangle.
Roll up each triangle, starting at the wide end, and place on the baking sheet.
Brush each roll with melted butter.
Bake for 10–12 minutes, or until golden brown.
Let cool slightly and dust with powdered sugar before serving, if desired.