Beat the eggs and sugar together until well blended.
Mix in the butter and pumpkin to combine.
In a separate bowl, whisk together the flour, pumpkin pie spice, cinnamon and salt.
Slowly add the dry ingredients to the pumpkin mixture and mix until well blended.
Pour the mixture into a 9x9 inch baking pan.
Bake at 350˚F for 30-40 minutes or until set. Cool Completely.
Make the icing while the bars bake by beating the cream cheese, sugar, butter and vanilla together in a large bowl. Slowly add the milk until the desired consistency.
Spread the icing over the bars and cut into squares.