Here is one of my go-to cookies for the holidays.
2 1/2 cups of walnuts
1/2 cup powdered sugar
1/2 teaspoon salt
2 sticks of butter, diced
1 teaspoon real vanilla extract
1 cup unbleached flour
Place walnuts and powder sugar into the food processor, pulse to break up the nuts, then turn on the processor until nuts are finely ground. Next slowly add the butter to the food processor, pulsing to incorporate, then full-on until smooth. Pour in vanilla and salt while the food processor is going. Now add the flour, pulsing again until the dough starts to form into a ball. Remove from processor and place dough on some plastic wrap, flatten the dough into a disc, wrap and chill for at least 2 hours but is best overnight.
Preheat oven to 350 degrees
Remove dough from the fridge, unwrap, and working with your hand pull off small pieces of the dough and form into 1 inch balls, place the balls onto a parchment-lined cookie sheet flatten the ball slightly so they do not roll around the sheet. Place the balls about 2 inches apart.
Bake for about 15 minutes or until they start to golden brown around the edges. Remove from the oven and place it on a cooling rack. While on the rack sift powdered sugar over the warm cookies. Once the cookies have completely cooled, roll the cookies in more powder sugar.