Preheat the oven to 375 degrees F (190 degrees C). Line baking sheets with parchment paper.
In a small bowl, dissolve the instant coffee powder in the warm water. Set aside.
In a large bowl, cream together the light brown sugar and granulated sugar until light and fluffy. Beat in the softened butter until well combined.
Add the egg and vanilla extract and beat until well combined.
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Stir in the dissolved coffee and chocolate chips.
Drop rounded tablespoons of dough onto the prepared baking sheets.
Bake for 10-12 minutes, or until the edges are golden brown.
Let the cookies cool on the baking sheets for a few minutes before transferring them to a wire rack to cool completely.
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Notes
For a richer coffee flavor, use espresso powder instead of instant coffee powder.If you don't have semisweet chocolate chips, you can use chopped chocolate or chocolate chips of another variety.For a chewier cookie, bake for 10 minutes. For a crispier cookie, bake for 12 minutes.These cookies can be stored in an airtight container at room temperature for up to 3 days.