Brownie Brittle Chocolate Chip Cookies

0 Stir the flour, baking soda, cornstarch, and salt together in a small bowl and set aside.
1 In a large bowl, cream the butter and sugars together until no lumps remain.
2 Add egg. egg yolk, and vanilla. Mix well.
3 Add the dry ingredients to the wet ingredients and mix together.
4 Gently fold in the brownie brittle making sure to not crush it too small.
5 Cover and place in fridge for at least 2 hours, preferably over night.
6 *When ready to bake*
7 Preheat oven to 350°
8 Take the dough out of the fridge and scoop onto parchment lined cookie sheet.
9 Top each mound of dough with 9-12 chocolate chips. Or as many as you want.
10 Bake for 9-11 min. Do not over-bake. They will look underdone and that's okay.
11 Let cool on cookie sheet for 10 min and then move to a wire rack to completely cool.
12 Repeat until all dough is used.