Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper or silicone baking mats.

Prepare the cookie dough:

• In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
• Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

Combine dry ingredients:

• In a separate bowl, whisk together the flour, cocoa powder, instant coffee or espresso powder, baking soda, and salt.

Mix wet and dry ingredients:

• Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix.
• Fold in the chocolate chips until evenly distributed through the dough.

Form cookies:

• Drop rounded tablespoonfuls of dough onto the prepared baking sheets, spacing them about 2 inches apart.

Bake the cookies:

• Bake in the preheated oven for 10-12 minutes, or until the edges are set and the tops are slightly cracked. The centers should still be soft.
• Remove from the oven and let the cookies cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.

Make the glaze:

• In a small bowl, whisk together the powdered sugar, cocoa powder, brewed coffee, and vanilla extract until smooth and well combined.

Glaze the cookies:

• Once the cookies are completely cooled, drizzle the glaze over the tops of each cookie using a spoon or a piping bag.

Let the glaze set: Allow the glaze to set for about 15-20 minutes before serving or storing the cookies.