Preheat oven to 350°. Grease a 9×9 pan. Set aside. (For thinner bars, use a 9x13 pan.)
For the Sugar Cookie Bars:Cream together the butter and sugar for 2 minutes.
Add in the vanilla and egg. Mix thoroughly.
Mix in the baking powder, flour and salt until well combined.
Press into the prepared pan. Bake at 350° for 25-30 minutes or until puffy and no longer glossy. You’ll want to pull them before they start turning brown.Let cool completely before frosting.
For the Frosting: First, use a blender or food processor to turn your freeze dried strawberries into a powder.
Cream together the butter, freeze dried strawberries, powdered sugar, vanilla and milk until smooth and creamy. You can adjust the texture of the frosting by adding more milk or more powdered sugar to your preference.
Frost cooled sugar cookie bars and top with sprinkles, if desired.