Cream butter & sugars, add egg, milk, and vanilla.
Combine salt, baking powder, and flour in a separate bowl.
Add the dry ingredients to the wet mixture, mix slightly and add the oil.
Add the corn flakes, oats, and chocolate chips.
Mix just until combined.
Drop teaspoonfuls onto a baking pan lined with parchment paper.
Bake at 350F (148C) for 13 minutes.