Preheat the oven to 350° and position 2 racks in the lower third. In a medium bowl, whisk together the flour, baking powder, baking soda and salt. In a large bowl, using an electric mixer, beat the butter, brown sugar and granulated sugar until fluffy. Beat in the eggs and vanilla at medium speed until combined. Add the dry ingredients and beat at low speed until barely combined. Add the coconut, chocolate chips, raisins and nuts and beat until they're evenly distributed.