Moist Apple Cinnamon Crumb Cake

Instructions

1. 1

   Preheat the oven to 375°F. Grease a 10-inch tube pan with a removable bottom.

2. 2

   In a large bowl, cream the softened butter and 1 cup of the sugar until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla.

3. 3

   In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Add the dry ingredients to the creamed mixture alternately with the sour cream, mixing well after each addition.

4. 4

   In a small bowl, combine the remaining 1/2 cup sugar, chopped walnuts, and cinnamon.

5. 5

   Spread half of the batter into the prepared pan. Top with the sliced apples, then sprinkle with half of the cinnamon-walnut mixture. Spread the remaining batter over the top and sprinkle with the remaining cinnamon-walnut mixture.

6. 6

   Bake for 40-45 minutes, or until a toothpick inserted in the center comes out clean. Allow the cake to cool in the pan for 30 minutes, then carefully remove it from the pan and let it cool completely on a wire rack before serving.