Sift together the flour, cocoa powder, baking soda, instant coffee and salt; set aside. In a medium bowl, cream together melted butter, brown sugar and white sugar until well blended. Add eggs, one at a time, until light, creamy, and fluffy, making sure to mix in between. Add vanilla extract. Mix in dry ingredients stir just until mixed in, do not overmix! Stir in the chocolate chips.