Grease a 9 x 13-inch baking pan and preheat the oven to 350°F.

Take a large bowl and beat sugar, egg, pumpkin, and oil in it.

Take another bowl and whisk the baking soda, pumpkin pie spice, flour, and salt in it.

Now mix dry and wet ingredients and stir well. Pour the mixture into the baking pan and bake for 25-30 minutes, depending on the heat of your oven.

Insert a toothpick in the middle; when it comes out clean, your pumpkin bars are ready. Let cool completely.

Take a separate bowl and beat the butter and cream cheese in it until smooth.

Also, beat in vanilla, powdered sugar, and salt. Do not over-beat.

After that pour the cream cheese on top of completely cooled bars.

Cut the bars and serve!