Preheat the oven to 350°F.
With an electric mixer, cream together the butter, granulated sugar, and brown sugar. The mixture should become light and fluffy after 2-3 minutes.
Mix in the eggs and vanilla one at a time, mixing after each addition.
In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
Add the oats, and stir well.
Add the dry ingredients to the wet ingredients, and mix until combined.
Fold in the corn flakes, coconut, and chocolate chips.
Scoop the cookie dough up with a tablespoon and arrange 2-3 inches apart on an un-greased cookie sheat.
Bake for 12-15 minutes, until golden brown.
Let cool on the cookie sheet for 10 minutes.
Carefully transfer baked cookies from cookie sheet to cooling rack and let cool completely.