Whisk the flour, baking soda, ground ginger, cinnamon, and salt in a medium bowl until fully combined.
Cream the softened butter and brown sugar together in a large mixing bowl until light and fluffy.
Add the molasses and egg to the butter mixture, beating well until smooth.
Gradually stir the dry ingredients into the wet ingredients until a soft dough forms.
Chill the dough in the refrigerator for at least one hour.
Preheat oven to 350°F and line two baking sheets with parchment paper.
Scoop rounded tablespoons of dough and roll into balls.
Roll each ball first in granulated sugar, then generously in powdered sugar.
Place on baking sheets and bake for 12 minutes.
Remove and cool on a wire rack.