Name: Brown Sugar Shortbread
Yield: 3 to 5 dozen cookies, depending on how you cut them
Ingredients: 4 sticks (1 pound plus 2 tablespoons unsalted butter, softened); 9 ounces light brown sugar; 5 ounces white sugar; 2 eggs (room temperature); 1 tablespoons pure vanilla extract; 1 pound 3 ounces organic King Arthur bread flour; 1 teaspoon kosher salt; 1 1/2 cups coarsely chopped walnuts (optional)