Preheat the oven to 350 and prepare a 9-inch round cake pan with parchment paper and grease. Set to the side.
Mix the brown sugar, granulated sugar, eggs, and melted butter in a large bowl with a whisk. Add in the sour cream, vanilla, and salt. Whisk until smooth.
Add in the flour, baking powder, and baking soda. Mix to combine.
Using a rubber spatula, fold in the apples, cranberries, and ginger.
Add the batter to the prepared cake pan and top with extra ginger pieces and coarse sugar if desired.
Bake the cake in the oven for 40-50 minutes. A toothpick will run clean when the cake is done.
Let the cake fully cool in the pan on a cooling rack. Remove when cool and slice.