-
Preheat oven to 350˚F. Spray baking sheet with Baker's Joy spray.
-
Combine flour, sugar, baking soda, baking powder, salt, cinnamon and cloves in a large bowl of electric mixer fitted with paddle attachment.
-
Combine egg yolk, espresso, milk and vanilla. With mixer running, pour liquid mixture into flour mixture beating until a dough forms. With mixer on low speed add hazelnuts and chips and mix, just until combined.
-
Turn dough onto floured surface and knead lightly. Halve dough and form each half into a flattish 12 x 2- inch log. Arrange logs on baking sheet and brush with egg wash if desired. Bake 35 minutes.
-
Remove from oven and gently transfer loaves to cutting board. Cut into ¾- inch thick slices. Arrange biscotti, cut sides down, on baking sheet. Bake 10 minutes, turning once. Remove to wire rack and cool completely. Store biscotti in an airtight container.