Creating this Cinnamon Apple Cake is a simple process. Follow these steps to achieve delightful results:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan or line it with parchment paper.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, cinnamon, baking powder, baking soda, and salt until evenly combined.
3. Cream Butter: In another bowl, cream the softened butter using an electric mixer until light and fluffy, about 2-3 minutes.
4. Add Eggs: Beat in the eggs one at a time, ensuring each is well incorporated. Add the vanilla extract and mix until combined.
5. Blend Wet Ingredients: Stir in the sour cream until the mixture is smooth and uniform.
6. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, folding gently until just combined. Be careful not to overmix.
7. Add Apples and Nuts: Fold in the chopped apples and nuts, ensuring they are evenly distributed throughout the batter.
8. Transfer to Pan: Pour the batter into the prepared baking pan, smoothing it into an even layer.
9. Bake: Place the pan in the preheated oven and bake for 40-50 minutes or until a toothpick inserted into the center comes out clean.
10. Cool: Once baked, remove the cake from the oven and allow it to cool in the pan for 20 minutes. Then, transfer it to a wire rack to cool completely.
11. Dust with Powdered Sugar: If desired, dust the top of the cake with powdered sugar before serving.

By following these steps, you’ll be well on your way to creating an incredible Cinnamon Apple Cake that is sure to impress.