To prepare a impossible southwestern pie baked goods recipe, first you will need to prepare the ingredients for the pie. First, preheat the oven to 325 degrees F (180 degrees C). Then, combine the flour, baking powder, sugar, salt, and vanilla extract. Add the dry ingredients to the wet ingredients and stir to combine. Pour the mixture into the cooled pie shell and bake for 30 to 40 minutes or until the crust is golden brown and the filling is bubbly.