Preheat oven to 400°F
Whisk together the dry ingredients in a large bowl: All-Purpose flour, cake flour, corn starch, baking soda, baking powder and salt. Set aside.
1 1/4 cup All-Purpose Flour, 3/4 cup Cake flour, 1 tsp. corn starch, 1/2 tsp. baking soda, 1/2 tsp. baking powder, 1/2 tsp. salt
Using a stand mixer fitted with the paddle attachment, cream the cold butter with the white sugar and brown sugar. Cream until light and fluffy, 2-4 minutes. 1/2 cup butter, cold, unsalted, cubed (8 Tbsp.), 1/2 cup brown sugar, packed, 1/4 cup granulated white sugar
Then add in the egg, egg yolk, and vanilla extract. 1 large egg, 1 large egg yolk, 1 tsp. vanilla extract
Gradually add in the dry ingredients and then add in 1 cup white chocolate chips and dried cranberries. If your cookie dough ever feels dry, you can add a splash of milk to hydrate the dough.
2 cups white chocolate chips, divided, 3/4 cup dried cranberries
Shape dough into 6 large cookies (~5 oz. each) or you can make them smaller. Place on an ungreased cookie sheet. Bake for 10-12 minutes for large cookies, ~7-8 minutes for smaller cookies. Do not over bake.
Let cookies cool on the cookie sheet for 15 minutes and then transfer to a wire cooling rack.
Melt the white chocolate chips in a microwave safe bowl in 30 second increments until fully melted and smooth. Dip each cookie half way into the melted chocolate. Alternativley, you can use white chocolate melting wafers.
Place on parchment paper. Repeat with remaining cookies. Allow the chocolate to set so it cools and hardens. Enjoy!