01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together rolled oats, flour, baking soda, cinnamon, and salt until well combined.
03 - In a large bowl, beat butter, brown sugar, and granulated sugar together until creamy and smooth, about 2 minutes.
04 - Add egg and vanilla extract to the butter mixture. Beat until fully incorporated and smooth.
05 - Gradually mix the dry ingredients into the wet ingredients, mixing just until combined. Do not overmix.
06 - Gently fold in shredded coconut, chopped dates, and raisins with a spatula until evenly distributed throughout the dough.
07 - Scoop tablespoon-sized mounds of dough onto the prepared baking sheets, spacing them about 2 inches apart to allow for spreading.
08 - Bake for 11 to 13 minutes, or until edges are lightly golden brown and centers appear set.
09 - Let cookies cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely before serving.