Ingredients

For Apple Filling
• 2 large apples, peeled
• 2 1/2 tbsp butter
• 1/4 tsp ground cinnamon
• 1 tsp brown sugar, packed
• pinch ground nutmeg
For Cake
• 1 cup (2 sticks) unsalted butter, room temperature
• 1 cup sugar
• 4 eggs, separated
• 1 tsp pure vanilla extract
• 3/4 cup sour cream
• 1 1/2 cups all-purpose flour or cake flour
• 1 tsp baking powder
• 1/2 tsp baking soda
• 2 tsp ground cinnamon
• pinch of salt
For Frosting
• 8oz cream cheese, room temperature
• 3/4 cup powdered sugar
• 1 tsp ground cinnamon
• 1 tsp vanilla
• 1/2 cup heavy cream, cold

Directions

1. Preheat the oven to 350 degrees Line the bottom of a 9x5 loaf pan with a piece of parchment or waxed paper, and butter the paper. Lightly dust the pan with flour, shaking out the excess.
2. After peeling the apples, dice them into 1/4 inch pieces. Melt the 2 1/2 tbsp butter over low/medium heat; add the cinnamon, brown sugar and nutmeg.
3. Add the diced apples and cook for 10-15 minutes, stirring frequently until the apples are golden and slightly drier. Set aside.
4. In a mixing bowl, cream the butter and sugar until light and fluffy. Add the egg yolks and vanilla and beat until smooth. Add the sour cream and beat to combine.
5. Sift the flour, baking powder, baking soda, cinnamon and salt together, and add to the butter mixture in three batches, stirring with a wooden spoon until just combined.
6. Beat the egg whites in a bowl until they hold soft peaks. Stir a third of the whites into the batter to combine. Fold the remaining whites into the batter with a rubber spatula until just combined. Do not over mix.
7. Fold the fried apples into the batter and scrape into the prepared loaf pan. Dust the entire top with cinnamon and sugar; bake for 35 minutes.
8. Reduce the oven temperature to 325 degrees and bake 45 minutes longer (checking after 35 minutes, and again at 40 minutes) or until pound cake is golden brown and a toothpick comes out clean when inserted into the center. Cool the cake in the pan on a rack for at least an hour before turning it out of the pan. Place it back on the rack and allow it to cool completely.
For Frosting
9. Beat the cheese, sugar, cinnamon and vanilla until smooth and fluffy. In a separate bowl, beat the heavy cream to nearly stiff peaks, then add the whipped cream into the cheese mixture.
10. Quickly and briefly beat to combine. Do not over beat.