01 - Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
02 - In a medium bowl, whisk together the flour, rolled oats, baking soda, salt, ground cinnamon, and ground ginger until evenly distributed.
03 - In a large bowl, beat the softened butter, granulated sugar, and packed brown sugar together using an electric mixer until light and creamy, about 2 to 3 minutes.
04 - Add the eggs one at a time, beating well after each addition. Stir in the pure vanilla extract until fully blended.
05 - Gradually add the dry ingredient mixture to the creamed butter mixture, mixing on low speed just until combined. Do not overmix.
06 - Gently fold in the diced apple, raisins, and chopped nuts if using, distributing them evenly throughout the dough.
07 - Drop heaping tablespoons of dough onto the prepared baking sheets, spacing each portion about 2 inches apart to allow for spreading.
08 - Bake for 11 to 13 minutes, or until the edges are golden brown and the centers appear just set. Rotate the baking sheets halfway through for even browning.
09 - Allow the cookies to cool on the baking sheets for 5 minutes, then transfer them to a wire rack to cool completely before storing.