Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
Beat butter, brown sugar, and granulated sugar until light and fluffy.
Add espresso powder, eggs, and vanilla extract, mixing until well combined.
In another bowl, whisk flour, cocoa powder, baking soda, and salt.
Slowly add dry ingredients to the wet mixture, stirring until just combined.
Fold in chocolate chips, making sure they're evenly distributed.
Scoop dough onto baking sheet, spacing them 2 inches apart.
Bake for 10-12 minutes until the edges are set but centers remain soft.
Let cool for 5 minutes, then transfer to a wire rack.
Eat one (or five) while they’re still warm and melty.