Preheat the oven to 350°F. Line a light-colored aluminum 9 × 5-inch loaf pan with parchment paper, or grease and flour it.
Whisk the flour, cinnamon, cornstarch, baking powder, salt, baking soda, nutmeg, and ginger in a large bowl.
In another bowl, whisk the oil, apple cider, eggs, sour cream, brown sugar, granulated sugar, vanilla, and apple cider vinegar. Fold the wet ingredients into the dry ingredients just until combined.
Transfer the batter to the prepared pan. Bake for 45–50 minutes, until a toothpick inserted into the center comes out clean or with a few moist crumbs.
Cool in the pan for 10–15 minutes. Invert onto a parchment-lined wire rack and cool completely, approximately 45–50 minutes more.
Whisk the powdered sugar and water into a thick paste. Brush it over the top and sides of the loaf.
Mix the granulated sugar and cinnamon. Sprinkle the mixture over the coated loaf, pressing gently so it adheres. Slice when ready to serve.