2 cups cake flour
½ teaspoon baking soda
¼ teaspoon baking powder
7 tablespoons butter, at room temperature
½ cup sugar
¼ teaspoon salt
1 egg, beaten and divided in half
¾ cup finely chopped toasted walnuts, plus 12 raw walnut halves
Sift the cake flour, baking soda and baking powder together and set aside. Mix the butter, sugar, and salt in a large mixing bowl. Stir thoroughly until the butter and sugar are creamed. Add the flour mixture to the butter-sugar mixture and mix thoroughly. Add half of the beaten egg. Add the chopped walnuts and work the mixture into a dough ball. You can do all of this by hand or with an electric mixer.
Line a baking sheet with parchment paper. On a clean surface, roll the dough ball into a tube, and cut it into 12 equal pieces. Roll each into a ball and position them on the baking sheet a couple inches apart. All of the cookies should fit onto one pan.
Take the walnut halves and gently press one into each cookie. Let the cookies rest for 15 to 20 minutes, covered with a clean kitchen towel.
While that’s happening, preheat the oven to 350 degrees F. Once the dough is done resting, brush each with the other half of the beaten egg you omitted from the cookie dough and then bake for 20 minutes. Turn off the oven and let the cookies sit inside the oven for another 5 minutes before taking them out. Let cool and enjoy!