Preheat the oven to 375°F.
To make the topping, in a medium bowl, combine 1 cup flour, ⅓ cup white sugar, brown sugar, cinnamon, salt, and ginger if using. Add the cold butter and use a pastry cutter to cut in butter until the mixture starts to stick together and form crumbs the size of large peas, about 3 to 4 minutes. Place in the fridge while preparing the apples.
Place the sliced apples in a 2qt baking dish and toss with ¼ cup sugar, 2 tablespoons flour, and cinnamon.
Sprinkle the prepared crumble topping over the apple mixture. Bake uncovered for 35-40 minutes or until golden and the apples are soft.
Serve warm or room temperature with vanilla ice cream if desired.
