Chop hazelnuts in food processor in pulses. You can also chop with knife.
Cream butter, coconut sugar and vanilla essence together till light and fluffy.
Fold in Whole Wheat Flour and half of hazelnuts.
The batter will be slight sticky
Transfer the dough to a working mat. Add rest of the hazelnuts and roll the dough in hazelnuts and form a cylindrical log.
Make the log and roll into butter paper or cling film. Keep in refrigerator, for 1-2 hrs.
When ready to bake, preheat oven to 150°C or 325°F.
Cut and slice the dough log in 6-8 mm slices.
You can keep the cookies in refrigerator for another 30 minutes.
Bake for 15-20 mins for 150°C or 325°F.
Once baked take out of the oven.Leave these on the counter to cool completely,as freshly baked are very soft and can break. Transfer with the help of a spatula.
For more crispy cookies you can leave cookies in oven for an extra 5 minutes.