Preheat oven to 375 degrees. In a mixing bowl, whisk together flour, cornstarch, baking powder, baking soda and salt, set aside. In the bowl of an electric mixer, cream together chilled butter, sugar, molasses and coffee creamer powder until well blended and slightly fluffy, about 4 minutes. Stir in egg and vanilla bean paste. Slowly add in dry ingredients and mix until well incorporated (mixture will be very thick). Mix in milk chocolate and semi-sweet chocolate chips. Form dough into about 2 1/2 tablespoon balls (a bit larger than a golf ball), then drop 8 per sheet onto buttered cookie sheets. Bake 10-11 minutes, until edges are very lightly golden. Cool on cookie sheet several minutes before transferring to wire rack to cool. Store in an airtight container. To enjoy warm cookies later on, pop cookie in the microwave for 10 seconds if desired.
Recipe Source: Cooking Classy
Notes
*This is NOT liquid coffee creamer, that would most certainly yield entirely different results. Also, don't use light. I have tried both flavors, original and french vanilla and love both. The french vanilla adds one more layer of flavor, it's delish.