Blend butter and sugars together
Add eggs, and beat until fluffy
Whisk together flour, baking soda, salt, and baking powder in a separate bowl
Mix the dry ingredients into the egg mixture
Stir in cornflakes, oats, vanilla, and chocolate & butterscotch chips
Scoop onto greased or lined cookie sheets
Bake at 350° F (175° C) for 15 minutes
Cool on wire racks