Soft Sugar Cookie Bars with Buttercream Frosting

I wasn't sure what to make for our Valentine's treats to pass out to friends this year, but I did know life has been extra crazy so we needed to keep it simple. Then I saw these guys on Cassie Craves and knew they would be perfect. What I didn't know is just how absolutely AMAZING they would really be. They are completely addictive so be sure you are sharing them with someone!!! (I doubled the dough recipe but still had enough frosting from one batch to frost them both) I think I may be making these for every holiday from now on :-)!

INGREDIENTS:
For the bars:
1 1/2 cups sugar
1 cup butter, room temperature
8 oz cream cheese, room temperature
1 egg
2 teaspoons vanilla extract
2 1/2 cups flour
1/2 teaspoon baking soda
1 teaspoon baking powder
For the frosting:
1 cup unsalted butter, room temperature
1 teaspoon vanilla extract
4 cups powdered sugar
Pinch of salt
6 tablespoons heavy cream

DIRECTIONS:
1. Preheat oven to 350. Line a jelly roll pan (15 x 10 x 1) (I used a regular baking pan so mine were a little thicker) with aluminum foil and spray lightly with cooking spray.
2. In a mixer, cream butter, cream cheese and sugar together. Add in egg and vanilla and mix until incorporated.
3. With mixer on low, add flour, baking powder and baking soda. Mix until just combined.
4. Press dough evenly into your prepared pan. The dough will be sticky. (it's very sticky, I put my hand in a baggie and sprayed it with some cooking spray to push it into the pan)
5. Bake for 20 minutes until edges begin to golden. Cool completely before frosting.
6. To make the frosting, cream together the butter and vanilla. Slowly beat in the powdered sugar and the pinch of salt. Once smooth and creamy, add in heavy cream, 1 tablespoon at a time, then beat at medium-high speed for a minute or two until light and fluffy. If desired, add food coloring and beat until combined.