In large bowl, whisk together 1 cup (250 mL) of the sugar, oil, molasses and egg until smooth.
In separate bowl, whisk together flour, ginger, cinnamon, baking powder, baking soda and salt ; stir into sugar mixture.
Shape by rounded tablespoonfuls (15 mL) into balls; roll in remaining sugar to coat. Place 2 inches (5 cm) apart on parchment paper–lined or greased rimless baking sheets.
Bake in top and bottom thirds of 375°F (190°C) oven, rotating and switching pans halfway through, until cookies spread out and tops crack, about 12 minutes. Let cool on pans on racks for 10 minutes; transfer to racks and let cool completely.(Make-ahead: Layer between waxed paper in airtight container and store for up to 3 days or freeze for up to 1 month.)