In a large mixing bowl, cream together cold butter, brown sugar, granulated sugar until light and fluffy (about 4 minutes). You can use a stand mixer or hand held mixer
Add eggs one at a time and mix well
Stir in the dry ingredients, flours, cornstarch, baking soda, and salt. Using a wood spoon or spatula stir in the white chocolate chips.
Take about 1/3 of the strawberry jam to add to the top of the dough. Using a spoon or knife swirl the jam through the dough. Using a large cookie scoop make your dough balls, making sure to great streaks of jam.
Repeat the process of jam swirling to make all dough balls.
Place dough on a lined cookie sheet and place in freezer for at least 4 hours.
Preheat oven to 375. On a lined cookie sheet placed cookies about 2 inches part (5-6 cookies per sheet). And bake for 18-20 minutes. Set on cooling rack to completely cool before digging in. Enjoy!