Polish Cream Cheese Coffee Cake

Preheat 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 mixture comes together in a sticky dough.

Spread half the dough evenly into prepared baking dish.

Beat cream cheese, 1/2 cup white sugar, and 1 egg in another bowl until smooth.

Spoon mixture into baking dish over dough.

Drop remaining half of dough by spoonfuls over cream cheese mixture.

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

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