Heat the oven to 350 F. Combine flour, baking soda and salt in a bowl, whisk together and set aside. Blend together in the bowl of a stand mixer (or in a large bowl with a hand mixer or whisk) softened butter and both white and brown sugar until well combined.
Add into the butter and sugar mixture, both eggs, coffee grounds and vanilla and beat until smooth and glossy.
Using a measuring cup, slowly incorporate the flour mixture into the butter mixture and blend until dough begins to form and pull away from the sides of the bowl.
Move the dough to the fridge to chill while the oven preheats.
Once the oven has preheated, remove the dough from the fridge and using a medium-sized (1 1/2 tablespoon) cookie scoop, place cookie balls 2 inches apart on a non-stick cookie sheet.
Bake for 10-12 minutes and remove from oven, allowing to cool on the cookie sheet for an additional 5 minutes, then transfer to a wire cooling rack to finish.
