Step 1

Place racks in lower and upper thirds of oven; preheat to 375°. Whisk flour, baking soda, cinnamon, ginger, cardamom, and salt in a small bowl. Whisk egg, butter, granulated sugar, molasses, and brown sugar in a medium bowl. Mix in dry ingredients just to combine.

Step 2

Place sanding sugar in a shallow bowl. Scoop out dough by the tablespoonful and roll into balls (if dough is sticky, chill 20 minutes). Roll in sugar and place on 2 parchment-lined baking sheets, spacing 2” apart.

Step 3

Bake cookies, rotating baking sheets halfway through, until cookies are puffed, cracked, and just set around edges (overbaked cookies won’t be chewy), 8–10 minutes. Transfer to wire racks and let cool.

Step 4

DO AHEAD: Cookie dough can be made and rolled into balls 2 weeks ahead. Freeze on a baking sheet; transfer to resealable plastic bags. Let sit at room temperature 30 minutes before rolling in sugar.