In a large mixing bowl, cream together the softened butter and brown sugar until the mixture is light and fluffy, with a pale color and a gentle, rhythmic sound from mixing.
Add the beaten egg and grated fresh ginger to the creamed mixture, blending thoroughly until combined. The batter will become slightly glossy and fragrant.
In a separate bowl, whisk together the flour, baking soda, cinnamon, ground cardamom, and salt. This dry mixture will look uniform and powdery.
Gradually add the dry ingredients to the wet mixture, folding gently with a spatula or wooden spoon until the dough comes together and is slightly sticky but manageable.
Chill the dough in the refrigerator for 30 minutes to help it relax and make it easier to scoop, during which it will firm up slightly and develop better flavor.
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. Using a spoon or cookie scoop, portion out the dough into 1-inch balls and place them on the prepared sheet with space between each.
Bake in the preheated oven for 9–11 minutes until the edges are golden brown and the centers look just set. The cookies will spread and become fragrant as they bake.
Remove the cookies from the oven and let them cool on the baking sheet for 5 minutes, allowing them to firm up slightly for easier handling.
Transfer the cookies to a wire rack to cool completely, revealing a crisp, golden exterior with a slightly chewy center and a wonderful layered aroma of spices.
Serve the cookies once cooled, enjoying their fragrant spice blend and crispy-chewy contrast with a cup of tea or milk.