1. Using a hand/stand mixer, cream shortening, margarine, granulated sugar and brown sugar.
2. Add egg and beat until well incorporated, scraping down the sides when necessary.
3. In a small bowl add Evaporated Milk, Coffee and vanilla essence/extract, stir until dissolved and set aside. In another bowl, combine chocolate chips, flour, baking soda and salt. Set aside.
4. Starting and ending with the flour mixture, add alternately with the milk mixture to the creamed mixture until just combined. Do not overmix.
5. Chill dough for at least 30 minutes.
6. Using a tablespoon, scoop cookie dough, and place on parchment paper lined trays, 1-inch apart. Bake in a preheated 375°F/190°C oven for 12-15 minutes. Until edges are golden brown.
7. Allow to cool on the tray for 3 minutes then remove and continue cooling on a wire rack.