01 - 
                In a medium bowl, whisk together the all-purpose flour, cornstarch, and baking powder; set aside.
              
              
              
                02 - 
                Using an electric mixer, beat the softened butter and cream cheese until smooth and creamy.
              
              
              
                03 - 
                Add the egg, milk, and vanilla extract to the creamed mixture and mix until fully combined.
              
              
              
                04 - 
                Gradually blend in the powdered sugar, mixing until the batter becomes light and fluffy.
              
              
              
                05 - 
                Fold in the dry ingredients gently until evenly combined, then stir in the mini chocolate chips. Chill the dough in the refrigerator for approximately one hour to firm up.
              
              
              
                06 - 
                Preheat the oven to 190°C and line two baking sheets with parchment paper.
              
              
              
                07 - 
                Remove chilled dough and portion into 24 to 26 balls, spacing them about 3.8 centimeters apart on the baking sheets. Slightly flatten each ball.
              
              
              
                08 - 
                Sprinkle additional mini chocolate chips atop each cookie for an indulgent finish, if desired.
              
              
              
                09 - 
                Bake cookies for approximately 10 minutes or until edges are lightly golden.
              
              
              
                10 - 
                Allow cookies to cool on baking sheets for several minutes, then transfer to a wire rack to cool completely.