Whisk together the flour, baking powder, baking soda, and salt. Set aside.

In a separate bowl, beat together the butter, cream cheese and sugar until smooth.

Add the vanilla extract and egg and beat until mixed.

Add the dry ingredients and beat until a thick dough forms.

Cover the bowl and chill the dough for at least 1 hour.

When ready to bake, preheat the oven to 350°F and line a 9x9 pan with parchment paper, then grease the sides of the pan with nonstick cooking spray.

Press the dough into the prepared pan in an even layer and place in the oven to bake for 10 minutes, until just beginning to brown.

While the crust is baking, whisk together the pumpkin, egg, sweetened condensed milk, pumpkin spice, and salt.

Remove the pan from the oven and pour the pumpkin pie filling over the top of the crust. Return to the oven to bake for 30 to 35 minutes, until the center of the pumpkin pie filling is set.

Allow the bars to cool completely in the pan, then transfer to the refrigerator to chill for one hour before serving.