01 -
Mix flour, sugar, salt, butter, egg yolk, and whole egg in a processor until just combined. Gently smooth into dough on a floured counter.
02 -
Pop the dough in the fridge for half an hour. While waiting, scoop Nutella onto a tray lined with parchment and freeze for 20-30 minutes until it hardens.
03 -
Warm the oven to 350°F (180°C). Lay parchment on baking trays. Roll your dough out to a thin sheet (about 1/8 inch).
04 -
Cut out 3½-inch rounds, place one frozen Nutella dollop in the middle, cover with another dough circle (with slits), secure edges with a fork, and coat with egg wash.
05 -
Bake for 20-25 minutes. They're ready when golden. Let them cool or eat warm, with a sprinkle of powdered sugar if you want.