Preheat your oven to 350 degrees F (180 degrees C). Line two baking sheets with parchment paper or silicone mat.

Melt the chocolate and butter in a large heatproof bowl, placed over a saucepan of simmering water or in a microwave in 30 second intervals. Set aside to cool slightly

In a bowl of a stand mixer or a bowl using a hand mixer beat the sugars , egg, egg yolks and vanilla for 3-4 mins until light and fluffy.

Beat the chocolate mixture into the egg mixture. Finally, beat in the cocoa powder, flour, salt, instant coffee and baking powder until well combines.

Using a large cookie scoop, roll out as many cookie balls out of the dough as possible and place them on a cookie sheet 2 inches apart. Place a few mini chocolate chips on top of the cookie balls.

Bake for about 10-11 mins. Let the cookies cool on the baking sheet for 20-25 mins before removing.