01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, oats, baking soda, baking powder, cinnamon, and salt.
03 - In a large bowl, cream softened butter, brown sugar, and granulated sugar until light and fluffy.
04 - Beat in maple syrup, egg, and vanilla extract until thoroughly combined.
05 - Gradually stir the dry mixture into the wet ingredients until just incorporated.
06 - Fold in raisins and nuts (if using) with a spatula.
07 - Drop heaping tablespoons of dough onto prepared baking sheets, spacing about 2 inches apart.
08 - Bake for 11 to 13 minutes until edges are golden and centers remain slightly soft.
09 - Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.