Whisk together the flour, baking soda, ginger, cinnamon, and salt. Set aside.
Using an electric mixer on medium speed, beat the cooled butter and brown sugar until thoroughly combined. Add the egg and maple syrup, and mix well.
Reduce mixer speed to low. Gradually add the flour mixture, mixing just until combined.
Cover and chill the dough for 1 hour.
Preheat oven to 350°F (175°C). Line baking sheets with parchment paper or silicone liners.
Using a tablespoonful of dough at a time, roll the dough into balls. Place the cookies 2 inches apart on the prepared pans. Flatten the tops of each cookie slightly. Sprinkle with turbinado sugar if you like.
Bake 12 to 15 minutes, or until golden brown.
Cool on the pans on a wire rack for 5 minutes. Then transfer the cookies from the pans to a wire rack to cool completely.
Notes
Store in an airtight container at room temperature up to 3 days.