These sliced nut cookies are sometimes called “Jewish biscotti.”
Preheat oven to 375 degrees F. Mix butter at medium speed until smooth. Slowly add sugar; continue to mix until light and creamy. Add remaining ingredients, except cinnamon sugar; mix well. Pour out dough onto floured countertop. Form into three 1-inch-high loaves; transfer onto parchment-lined pans. Dust with cinnamon sugar and bake approximately 20 minutes, until lightly browned. Turn oven down to 350 degrees F. When cool, cut into 1-inch slices. Lay slices on their sides and toast lightly, about 5 to 10 minutes. If desired, dip ends of cooled slices in melted chocolate. Let harden on parchment paper.