Peppermint Sugar Cookie Bars

1. Step 1For the cookies: Preheat the oven to 350˚F. Lightly butter a 9-inch square baking pan. Line the pan with parchment paper, leaving an overhang on all sides. Whisk the flour and salt in a medium bowl; set aside. 
2. Step 2Beat the butter and cream cheese in a large bowl with a mixer on medium speed until smooth and fluffy. Add the granulated sugar and beat until smooth. Add the egg and vanilla and mix until fully incorporated, scraping down the bowl as necessary. Reduce the mixer speed to low and slowly beat in the flour mixture until combined. 
3. Step 3Transfer the dough to the prepared pan and gently spread into an even layer with an offset spatula. Bake until the edges are lightly golden, about 45 minutes. Let cool completely in the pan, then lift the bars out of the pan using the parchment overhang. 
4. Step 4Meanwhile, for the frosting: Combine the butter, powdered sugar and milk in a large bowl and beat with a mixer on medium speed until light and fluffy. Beat in the peppermint extract. Spread the frosting over the cooled bars and sprinkle with the candies. Cut into pieces.

Note: This recipe has been updated since it was originally published. The correct baking time is 45 minutes.