To prepare a sour cream orange pumpkin pie baked goods recipe, first you'll need to prepare your pie crust. First, preheat the oven to 350 degrees F (180 degrees C). Then, mix together the sugar, cornstarch, cinnamon, and salt. The sugar mixture should be light and fluffy. Next, add the eggs and vanilla. Finally, stir in the flour and baking powder. Pour the mixture into the pie shell and bake for 35 to 40 minutes, or until the crust is golden brown and the filling is bubbly.