In a large bowl, cream together butter and sugars. Add eggs and vanilla extract and beat until fluffy, about a minute.
In a separate bowl, sift together the flour, baking soda, baking powder, and salt. Gradually stir dry ingredients into butter mixture until just combined.
Add oats, pecans, rice krispies cereal, and shredded coconut. Stir until just combined.
Cover bowl or wrap dough in wax paper. Chill for at 1 hour (up to 24 hours) in the refrigerator. Refrigerating will help the flavors meld and also create a firmer dough to roll into balls.
Preheat oven to 350 degrees
Remove dough from refrigerator and allow to sit at room temperature for 10 minutes. Scoop dough using a 1.5 tablespoon scoop or shape by hand into 1.5 inch balls.
Place cookie dough balls 2 inches apart onto a parchment lined baking sheet. Bake for 9-11 minutes, or until lightly browned around edges. Allow to cool for 5 minutes before removing to a wire rack to cool completely.
Your cookies will keep for 5-7 days in a sealed container. To help keep cookies fresh, you can place a slice of bread in the container with the cookies. Replace the bread slice as needed. You can keep raw cookie dough in the refrigerator for 3 days. Cookie dough balls (and baked cookies) freeze well, up to 3 months in a sealed plastic container or freezer bag. Allow frozen balls to thaw for up to 10 minutes on the baking sheet before baking, or add 1-2 minutes to the baking time.