Cream the butter and sugar together until light and fluffy
Beat the eggs in, one at a time, scraping the bowl between each addition
Mix in the vanilla extract
In a smaller bowl stir the flour, salt, and baking powder together
Add it to the sugar mixture and mix well
Scrape the dough into a 9x13 pan and pan out
Bake at 350˚ for 20 minutes or until the cookie is just lightly browned
Remove from the oven and cool completely in the pan on a wire rack
When you’re ready to frost put the soft butter in a mixing bowl and mix it lightly to make it smooth
Then mix in the powdered sugar, it will look crumbly
Add the vanilla, a pinch of salt, and one Tablespoon of the milk
Mix with the mixer, add another Tablespoon of milk and see how it looks, if it’s soft and spreadable you’re done, if you need to add more milk to make it spreadable you can add the last Tablespoon
Frost the sugar cookie in the pan and cover with desired sprinkles
Lift it out of the pan by the parchment paper and cut into bars
Enjoy!
Recipe by Wishes and Dishes at https://wishesndishes.com/holiday-sugar-cookie-bars/