01 -
Scoop 7 tablespoons of Nutella onto a parchment-lined plate. Freeze for 30 minutes until solid.
02 -
Heat oven to 350°F. Line a baking sheet with parchment paper.
03 -
Mix butter and both sugars until creamy. Add egg and vanilla, blend well.
04 -
Mix in flour, cocoa powder, baking soda, and salt until just combined.
05 -
Form 7 equal dough balls. Flatten each, add frozen Nutella in center, fold edges over.
06 -
Roll balls in chopped hazelnuts. Press to 1-inch thickness on baking sheet.
07 -
Bake 10-11 minutes. Top with extra Nutella. Cool 20 minutes on sheet, then move to rack.