Preheat the oven to 180C/350F and line a baking tray with greaseproof paper.
Pour the hot water into a small ramekin and add 1 teaspoon of the instant coffee and stir together until the coffee has dissolved. Set aside.
Cream the butter and sugars in a bowl until pale and fluffy, approximately 3 minutes with a hand beater.
Add the egg and beat until all well combined, approximately 1 minute.
Pour in the coffee to the cookie batter and beat until combined.
Add in the flour, baking soda, baking powder and salt and beat until just combined and no dry portions remain in the edges or base of your bowl.
Toss in ¾ of the roughly chopped chocolate and stir until your mixed through your cookie batter.
Scoop into balls with an ice cream scoop and press the top of each cookie in the remaining chunks of chocolate.
Place on your lined baking tray with 2 inches between each.
Bake for 14 minutes until golden on the edges and remove.
Allow to cool for a couple of minutes on the tray before placing on a cooling tray to cool completely.
Serve alongside your favorite hot beverage.
Dig in!