You may want to freeze half the dough.
In a large bowl or the bowl of a standing mixer, combine sugar, molasses, butter, and egg. In a separate bowl, whisk together remaining (dry) ingredients. Mix dry ingredients into moist until just combined.
Form four logs, each approximately 8 inches long and 1-½ inches in diameter. Wrap in parchment paper, and refrigerate until firm, about 1 hour.
Heat oven to 350°. Remove wrap and slice logs into ¼-inch-thick rounds. Toss each slice in a bowl of granulated sugar. Place on parchment-lined cookie sheet and bake 8 to 12 minutes.