In a large mixing bowl, mix butter, brown sugar, sugar and coffee granules, mix at mediun speed with electric mixer until creamy; beat in eggs until blended.
Combine the flour, baking powder, and salt; add to butter mixture, add vanilla and mix until well blended; Fold in chocolate chips.
Preheat oven to 350 degrees, (325 convection).
Divide dough in half, and shape each half into a 10-inch-by-2-inch log, (dough will be very soft---for easy handling, dust hands with flour) Place dough on baking sheet that has been sprayed with pan spray; bake each log for 25 minutes (15-20 for convection) or until firm.
Let cool on baking sheet for 5 minutes, then remove to wire racks and cool completely; When cool, carefully cut each log diagonally into 1/2 inch thick slices with a serratered knife; Return to baking sheet and bake at 350 degrees (325 convection) for 5 to 10 minutes, turn over and bake another 5 to 10 minutes, cool on wire racks; store in air tight container or plastic bag.
Grasshopper dipping Sauce:Mix all ingredients together, keeps indefinitely in refrigerator; Adult version, Mix all ingredients until smooth, enjoy.