Drop spoon full of nutella on a tray line with wax paper and freeze till firm (if u dont have wax paper u can use white leather)

Add butter, white sugar, brown sugar, egg and vanilla in a bowl and cream well.

Add flour to make a soft dough (if the dough is sticky u can add more flour)

Shape the dough into balls and flatten them on your palms, put the firm nutella in the middle of the dough shape in ball again. Bake