Preheat oven to 375 degrees and line cookie sheet with parchment paper. (If not using parchment, no need to grease the cookie sheet)
In medium sized bowl, add flour, salt, baking soda, and baking powder. Whisk for 30 seconds to blend and set aside.
In a large mixing bowl, add softened butter, oil, white sugar, brown sugar, egg, and vanilla extract and mix on medium speed just until combined.
With mixer on low speed, gradually add in the flour mixture. Mix just until combined. (You can also slowly stir it in by hand if you prefer)
Next, stir in the oatmeal, Rice Krispies, and coconut to combine.
Drop cookie batter onto cookie sheet, using a small spring loaded scoop or you can roll into balls (walnut size). Moisten fingers and flatten the cookies, or you can use the bottom of a glass.
Bake at 375 degrees F for 12 minutes or until lightly browned. Makes 5 dozen.