1Preheat oven to 350. Line cookie sheets with parchment paper.
Divide dough into 4 pieces. Wrap 3 pieces individually in plastie wrap and refrigerate.
2Roll remaining piece on a sheet of lightly floured wax paper to about 3/8 in. thick. Cut into 9 (two in. rounds); arrange 1 inch apart on cookie sheet. Repeat with remaining pieces of dough.
3Bake 8 to 10 minutes, until tops look done. Let cool on a cookie sheet 3 minutes. Transfer cookies to wire rack; let cool completely. Spread Nutella on half the cookies. Top with remaining cookies. Dust with powdered sugar.