Melt butter in a saucepan. Once butter is completely melted, add half of your chocolate chips and stir constantly until the chocolate is melted.
Remove saucepan from heat and stir in the milk, vanilla, instant coffee, and cocoa powder.
In a large bowl, beat together sugar and eggs until combined (about 1-2 minutes).
Stir in the chocolate mixture and beat until combined (about 1-2 minutes).
In a medium-sized bowl, mix together flour, baking soda, and salt. Add half of this to your chocolate mixture and beat until combined, then add the second half of your flour mixture.
Stir in the second half of your chocolate chips.
On a baking sheet lined with parchment paper, scoop out 2 tablespoons of dough, allowing room for the dough to spread.
Bake for 7-8 minutes.
Allow cookies to cool before moving them to a cooling rack.
Notes
Storage - Store in an airtight container in a cool, dry place for up to a week.
Reheating – If reheating from the freezer, let them come to room temperature on their own. Wrap them in a lightly moistened paper towel and then heat in the microwave for 15-30 seconds.