Sift together first five ingredients; set aside. In a bowl, cream butter and sugars. Add eggs, vanilla and lemon extract; beat well. Add dry ingredients; mix well. Stir in nuts. , Divide dough into four parts and shape into 11x1-1/2-in. rolls. Wrap in foil and chill overnight. , Slice cookies 3/8 in. thick. Bake on greased baking sheets at 350° for about 10 minutes.