<human>:  Could you recommend a good recipe for cinnamon apple cake?
<bot>: Preheat your oven to 350 degrees Fahrenheit. 2 Grease and flour a 9-inch round cake pan.3 In a large bowl, whisk together 2 cups of all-purpose flour, 1 teaspoon of baking powder, ¼ teaspoon of baking soda and ¼ teaspoon of salt.4 In a smaller bowl, combine 1 cup of melted butter, 1 cup of granulated sugar, 2 eggs and 2 teaspoons of vanilla extract.5 Stir in 1 cup of sour cream, 1 cup of peeled and diced sweet apples, and 2 tablespoons of ground cinnamon.6 Add the wet ingredients to the dry ingredients and mix together.7 Pour the batter into the prepared cake pan and bake for 35 to 40 minutes, or until a toothpick inserted into the center comes out clean.8 Let the cake cool completely before serving. Enjoy!