Big batch Chocolate Chip Cookies

1 1/2 c butter
1/2 c shortening or coconut oil
3 eggs
3 T vanilla
2 c brown sugar
1 1/2 c sugar
5-6 c flour
1 1/2 t baking soda
1 1/2 t salt

2 T Cornstarch 
3 c choc chips

Bake at 350⁰ for 10-11 min
Makes about 60 cookies (with small scoop)

45 cookies with medium scoop (bake 14 min)
30 cookies with large scoop (bake 17 min)