Step 1: Preheat your oven to 350°F (175°C) and generously grease a 9-inch springform pan or square baking dish.
Step 2: In a medium bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, and ginger until well combined.
Step 3: In a large mixing bowl, cream the softened butter with the granulated sugar and brown sugar until the mixture is light and fluffy, which usually takes about 3-5 minutes.
Step 4: Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next, then stir in the vanilla extract.
Step 5: Gradually add the dry ingredients to the wet ingredients, alternating with the sour cream, beginning and ending with the flour mixture. Mix until just combined.
Step 6: Gently fold in the chopped apples and cranberries using a spatula to ensure they are evenly distributed throughout the spiced apple cranberry cake batter.
Step 7: Spread the batter into the prepared pan and bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Step 8: Allow the spiced apple cranberry cake to cool in the pan for 15 minutes before transferring it to a wire rack to cool completely.