In a mixing bowl, combine the softened butter and granulated sugar until they become light and fluffy.

Add the egg into the mixture, ensuring a thorough combination.

In a separate bowl, sift together the all-purpose flour, cocoa powder, instant coffee granules, baking powder, and salt.

Gradually add the dry ingredients into the wet mixture and stir until a cohesive cookie dough forms.

Add the dark chocolate chips to the dough, mixing them evenly.

Cover the dough and place it in the refrigerator for a minimum of 30 minutes to allow it to firm up.

Preheat your oven to 180°C (350°F) and prepare a baking sheet by lining it with parchment paper.

Scoop out small portions of the dough and shape them into 1-inch balls.

Place the dough balls on the prepared baking sheet, ensuring they are spaced a few inches apart.

Bake in the preheated oven for approximately 12 minutes or until the edges have set while the centres remain slightly soft.

After baking, let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.

Enjoy your homemade Mocha Cookies alongside a cup of coffee or tea!