Preheat the oven to 325 degrees F.
Cream butter and sugar until light and fluffy.
Beat in eggs, one at a time.
Now beat in the vanilla.
Mix the flour, baking powder, cinnamon, instant coffee, baking soda, and salt in a separate bowl.
Add to butter mixture a little at a time, beating well between each addition.
Add the chocolate chunks and mix with a spoon until evenly distributed.
Divide the dough into 4 equal pieces.
Butter and flour 2 cookie sheets.
On each cookie sheet pat out 2 pieces of the dough into logs about 1/2 inch high, 1 1/2 inches wide, and 14 inches long(ish). Make sure the logs are at least 2 inches apart.
Place cookie sheets in the preheated oven. Bake for 25 minutes or until lightly browned.
Put the loaves on a cooling rack and let cool for 5 minutes.
Put the logs on a cutting board and using a serrated knife, slice the logs on a diagonal into 1/2 inch wide pieces.
Put the pieces back on the cookie sheet about 1/2 inch apart and put back in the oven for 10 minutes.
Let cool completely and then store in an airtight container.