Pre-heat oven to 175 degree C. Line up your baking tray with heat resistant silicon mat/butter paper/aluminium foil.
Sift together flour and salt and keep aside.
Add coffee powder in a bowl and mix it with the boiling water and set aside to cool.
In the bowl of your electric mixer, add butter and sugar and beat well until creamy and pale. This process would take a minimum of 3 minutes.
Now add the cooled coffee mixture, along with vanilla extract and beat until well combined.
Add the flour and beat just until combined. Do not over beat
Now add the chocolate chips and fold just until combined. Transfer the dough into a zip lock bag or a plastic wrap and refrigerate to firm it up a bit.
Once dough is firm, take it out and flour your counter generously. Place the dough on top of the floured surface. Dust some flour on top of the dough as well. Try to press it to make a round roughly on your counter. Ensure the dough does not stick to your hands. If it sticks add more flour. Dust your rolling pin and roll it to 1/4 inch thickness. Cut them into any favorite shapes using cookies cutters. Place them on the prepared baking sheet and bake in oven for 15 minutes
Do the same to the remaining dough until you are done. If dough gets soft during the process you can dust some flour over the top and roll it on a floured surface without over working the dough. Cool on wire rack and store in airtight container. Refrigerate for long.