Preheat oven to 350°F. Place hazelnuts on baking sheet and bake for 10 minutes stirring half way through. Remove and let cool

Place nuts in food processor and process until they become powder. Add walnut oil and process until they turn into a butter

In small bowl whisk together flour, baking soda, baking powder and salt

In separate large mixing bowl use mixer to blend butter, but butter, and both sugars until light and fluffy. Add egg and vanilla and blend in

Add flour to large bowl and mix on low. Add chocolate and mix by hand

Wrap cookie dough in plastic wrap and cool in refrigerator for an hour and a half

Preheat oven to 350 and cook for ten minutes