Beat together the butter, brown sugar & white sugar until light and fluffy.
Beat in the vanilla and egg to combine.
Beat in the flour, cornstarch, baking soda and pinch of salt until a soft dough has formed.
Stir in the cranberries and white chips in mixer on low.
Refrigerate the cookie dough for 4 hours.
Preheat oven to 350ª degrees.
Line two baking sheets with parchment paper.
Spray cooking spray.
Remove chilled dough from fridge and spoon onto baking sheet.
Place onto the cookie sheets about 1-2" apart from one another.
Bake for about 8-10 minutes.
They should look a little under cooked.
Place them on the rack to cool off.
Let cookies sit for about 10 minutes for the cookie to settle.
ENJOY!