01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together oats, flour, baking soda, baking powder, salt, cinnamon, and ginger.
03 - In a large bowl, cream the softened butter, brown sugar, and granulated sugar until light and fluffy using an electric mixer.
04 - Add the large egg and vanilla extract to the butter mixture, beating until fully combined.
05 - Gradually blend the dry ingredients into the wet ingredients, mixing until just combined.
06 - Gently fold in diced apple, raisins, and chopped nuts, if using.
07 - Drop rounded tablespoons of dough onto prepared baking sheets, spacing each about 2 inches apart.
08 - Bake for 11 to 13 minutes until cookies are golden at the edges but still soft in the center.
09 - Allow cookies to cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.