Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.

Beat 1 cup white sugar, 1/2 cup butter, and 1 egg in a bowl until smooth. Add sour cream and vanilla extract; mix well. Stir in 3 cups flour, baking soda, and baking powder until a sticky dough forms. Spread 1/2 dough evenly into prepared baking dish.

Beat cream cheese, 1/2 cup white sugar, and 1 egg in a separate bowl until smooth; spoon over dough in baking dish. Drop spoonfuls remaining 1/2 dough over filling.

Combine pecans, brown sugar, 1/3 cup flour, and 1/3 cup butter in a bowl until resembles coarse crumble; sprinkle over dough.

Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 45 minutes.