Ingredients
Equipment
Method
Make the cake batter
- Heat the oven to 350°F.
- Grease a 9x13-inch baking pan with 1 teaspoon of the vegetable oil.
- Whisk the flour, baking powder, baking soda, and salt together in a large bowl.
- In a second bowl, whisk the granulated sugar, eggs, remaining 1/2 cup vegetable oil, sour cream, and vanilla until smooth.
- Add the wet mixture to the flour mixture and fold just until no dry streaks remain.
- Spread the thick batter evenly in the prepared pan.
Make the cream cheese layer
- Beat the cream cheese and confectioners' sugar in a medium bowl until smooth.
- Beat in the egg until fully combined.
- Dollop the cream cheese mixture over the cake batter.
- Gently spread the cream cheese mixture into an even layer.
Prepare the apples
- Toss the diced apples with the cornstarch and cinnamon.
- Scatter the apples evenly over the cream cheese layer.
Make the oat topping
- Stir the oats, brown sugar, and melted butter together until evenly moistened.
- Sprinkle the mixture over the apples.
Assemble and bake
- Bake at 350°F for 50-60 minutes, until the topping is golden, the cake near the edge tests clean, and the center of the cream cheese layer registers 160°F on an instant-read thermometer.
- Cool in the pan on a rack for at least 1 hour before slicing.
- Refrigerate leftovers within 2 hours.
Notes
For the best texture, fold the cake batter just until no dry streaks remain. Refrigerate leftovers for up to 4 days; freezing is not recommended because the cream cheese layer may change texture. For a gluten-free variation, use a 1:1 gluten-free flour blend and certified gluten-free oats.
