INSTRUCTIONS
1. Preheat oven to 375°F.
2. Line a baking sheet with parchment or waxed paper.
3. In a large bowl, cream together the butter and sugar until smooth.
4. Beat in the VANILLA and eggs, one at a time.
5. In a separate bowl, combine the flour, COCOA and baking powder; stir into creamed mixture on low until well blended. Dough will be stiff.
6. By hand, stir in the chocolate chips and nuts.
7. Divide dough into two equal parts and place on prepared baking sheet.
8. Shape each into 9x2x1-inch logs making sure they are 4 inches apart. You can also use two pans.
9. Blend the egg yolk and water together and brush the loaves lightly with the mixture.
10. Bake at 375°F for 20-25 minutes, until firm.
11. Remove from pan, cool for 30 minutes.
12. Using a serrated knife, slice the loaves diagonally into 1-inch slices.
13. Return the slices to the covered baking sheet, placing them on their sides.
14. Reduce heat to 350°F and bake for 10 minutes on each side or until dry.
15. Cool completely and store in an airtight container.
16. (See notes for variations)
