Preheat oven to 350 degrees and adjust oven rack to be in the middle position.
Prepare two rimless cookie sheets with either silicone liner or parchment paper. Set aside.
Whisk flour, salt, baking soda, and baking powder together in bowl.
In a separate large bowl, combine sugar, melted butter, egg/egg yolk, and vanilla. Whisk until combined. Stir in flour mixture until fully incorporated and no white streaks remain. Stir in pecans, chocolate chips, coconut, and oats.
Drop level portions of dough (2.9 oz. for each cookie) onto prepared sheets and lightly press. Bake a total of 16 minutes turning half way through the bake. Remove and let cool on cookie sheet for 5 minutes. Transfer to a baking rack to finish cooling.
