Preheat oven to 350 degrees.
Spray an 8"x12"x3" pan with baking spray. Set aside.
In bowl of food processor, pulse apple pie filling until finely chopped. Set aside.
In a medium bowl, sift together flour, baking soda, and baking powder. Set aside.
In the bowl of an electric mixer, beat butter and sugars until fluffy, 3-5 minutes.
Add eggs, one at a time, beating well after each addition.
Stir in vanilla.
Add half of flour mixture. Stir to combine.
Mix in sour cream.
Add rest of flour mixture. Stir to combine.
Spread half of batter evenly in prepared pan.
Top with apple pie filling, leaving at least 1/2" around the edges.
Spread other half of batter of top.
Sprinkle with streusel topping.
Bake for 50-55 minutes, until cake tests done.