Winter Spice Cake with Caramelized Apple Topping

Name: Winter Spice Cake with Caramelized Apple Topping
Ingredients: Nonstick vegetable oil spray; 13 tablespoons unsalted butter, room temperature; 6 medium Golden Delicious apples (about 2 1/4 pounds), peeled, each cut into 6 wedges, cored; 4 tablespoons plus 1 3/4 cups sugar; 1 cup whipping cream; 1/2 teaspoon apple cider vinegar; 1 1/4 cups all purpose flour; 1 1/4 teaspoons ground cinnamon; 1 teaspoon baking powder; 1 teaspoon ground ginger; 1/2 teaspoon ground allspice; 1/2 teaspoon salt; 1/4 teaspoon baking soda; 2 large eggs; 1 1/2 teaspoons vanilla extract; 1/2 cup sour cream