cowboy cookies recipe

1 cup (2 sticks) unsalted butter, softened - 1 cup granulated sugar - 1 cup packed brown sugar - 2 large eggs - 1 teaspoon vanilla extract - 2 cups all-purpose flour - 1 teaspoon baking powder - 1 teaspoon baking soda - 1/2 teaspoon ground cinnamon - 1/2 teaspoon salt - 2 cups old-fashioned rolled oats - 1 cup semisweet chocolate chips - 1 cup chopped pecans or walnuts - 1 cup sweetened shredded coconut