01 -
Preheat your oven to 350°F (175°C). Line a couple of baking sheets with parchment paper so you're ready to go.
02 -
Grab your mixer and beat that soft butter with sugar until it's nice and creamy. Stir in the vanilla to combine.
03 -
In another bowl, blend the cocoa powder, flour, and a sprinkle of salt until it's all mixed up.
04 -
With the mixer running, slowly add the dry mix to the creamy butter mixture. Keep going until the dough holds its shape.
05 -
Form the dough into little 1-inch balls. Roll each one in the crushed hazelnuts. Leave about 2 inches of space between cookies on your tray.
06 -
Use your thumb or a small spoon to indent the center of each ball. Bake for 12-14 minutes. They should set but not get too hard.
07 -
While they're still warm, press down on the centers again if needed and spoon about a teaspoon of the chocolate hazelnut spread into each one. Add a whole hazelnut on top, if you'd like.
08 -
Leave them on the baking sheets for 5 minutes, then switch over to a wire rack and let them cool off completely.