Preheat oven to 350* F. Line a baking sheet with parchment paper.
In a small bowl, combine non-dairy milk, instant espresso, and vanilla. Stir until the espresso is dissolved and set aside.
¼ Cup Non-Dairy Milk, 2 teaspoon Instant Espresso, 2 teaspoon Vanilla Extract
In a large bowl using a hand mixer, or in the bowl of a stand mixer fitted with the paddle attachment, cream the non-dairy butter and brown sugar until light and fluffy. Then, add the non-dairy milk mixture and mix on low until well combined.
8 tablespoon Non-Dairy Butter, room temperature, 1 Cup Brown Sugar, tightly packed
Next, add the flour, cornstarch, coffee grounds, baking soda, and salt. Mix on low until just combined.
1 ¾ Cups All-Purpose Flour, 1 tablespoon Ground Coffee, ½ teaspoon Baking Soda, ¼ teaspoon Kosher Salt, 1 tablespoon Cornstarch
Finally, add the chocolate chips and stir to distribute.
1 Cup Chocolate Chips or Chopped Chocolate
Use a 3-tablespoon cookie scoop to scoop 8 evenly spaced cookie dough balls onto a parchment-lined baking sheet. Top each cookie with a few extra chocolate chips, pressing them into the top of the dough.
Bake the cookies in a 350* F oven for 13-15 minutes or until the edges of the cookies feel set to the touch.
Allow the cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to continue cooling. Repeat with the remaining cookie dough.