In a large bowl, beat the butter until light and fluffy.
Add sugar and salt and beat until well combined and pale yellow.
Beat in the egg and vanilla until well combined.
Gradually add the flour and beat until well combined.
Preheat oven to 350 degrees F.
Line a square baking pan with parchment paper.
Press cookie dough evenly into pan.
Bake for 20-25 minutes or until toothpick inserted comes out clean and the edges are just starting to turn light brown.
Remove from the oven and cool completely.
Chop nuts and set aside.
Melt chocolate chips in a microwave safe bowl stirring at 30 second intervals until smooth.
Pour chocolate over cookie bars and spread with offset spatula into en even layer.
Immediately top with chopped nuts. Let harden 15 minutes.
Remove the cookie bars from the pan using the parchment paper.
Cut into triangles and store in airtight container for up to 1 week.
Notes
Feel free to use buttercream frosting instead of melted chocolate. Or any other frosting of choice.
Parchment paper is a great way to line your pan to remove the cookie bars from the pan easily. Use cooking spray to spritz on the bottom before adding the cookie dough.
Sprinkle on Christmas m&m, sprinkles, or other topping ideas to dress up this easy recipe into a holiday cookie.
Make sure you allow the cookies to cool completely before you store them.
Try topping them with a classic cream cheese frosting instead!