Preheat oven to 375° Farenheit
Combine egg, butter (melted), white sugar, brown sugar, molasses, vanilla extract, garam masala, cinnamon, and ginger in a large bowl. Whisk to combine.
Add baking soda and all-purpose flour, and stir until combined.
Place dough on a length of plastic wrap, cover, and chill in the refrigerator for 30 minutes.
Divide dough into 12 equal pieces, and roll each one into a ball.
Roll each cookie in white sugar to coat it, then place on a baking sheet,
Bake for 9 minutes, rotating baking sheets halfway through. If you are cooking two sheets at the same time, swap places so the bottom sheet moves to the top for the second half of the cooking time.
Remove from oven and allow to cool complete before moving to a serving place or storage container.