Preheat oven to 350 degrees.
Cream together the butter and sugars until light and fluffy.
Add the milk, vanilla and eggs and beat well. Stir in cornflake crumbs and oatmeal.
Add the flour, baking soda and salt and mix.
Stir in the coconut, nuts, if using, and chocolate chips.
Place tablespoon-sized balls of dough on a lightly greased or lined cookie sheet and bake for 8-10 minutes until lightly golden around the edges.