Preheat the oven to 350 degrees and line a 15 x 10 jelly roll pan with parchment paper and lightly spray with non-stick spray. Set aside.
Add all "bar" ingredients to a large bowl. With a hand mixer (or a stand mixer), mix on low speed until moist and then medium speed for 2 minutes. Pour into the prepared pan and bake for 25-30 minutes until set and toothpick inserted into the center comes out clean.
While bars are cooling, make the frosting.
To Make the Cream Cheese Frosting
To a medium mixing bowl, add all "frosting" ingredients and beat on medium until smooth.
Once bars are completely cooled, spread frosting evenly over the top.
Slice into 48 bars & enjoy!
Store bars covered in the refrigerator for 3-5 days.Recipe from an old Pillsbury cookbook.