*In a large bowl using a hand-held mixer or stand mixer with paddle attachment, cream the butter and sugars together on medium speed until fluffy and light in color. Mix in egg and vanilla. Scrape down the sides as needed. On low speed, mix in flour, cornstarch, baking soda and salt. Stir in white chocolate chips & dried cranberries.
*Do not drop dough onto warm cookie sheets. Allow cookie sheets to cool completely between batches.