Preheat the oven to 350F and tear of a large sheet of parchment paper to cover a 9x13 baking dish
In a small bowl whisk together flour, salt and cocoa powder
In a standing mixer, beat butter and sugar until smooth.
Add red food coloring and mix well
Turn you mixer on low speed and gradually add flour mixture
You may need to use your hands to mix throughly to make sure that you get all the flour mixture.
Press the mixture into bottom of baking dish and bake for 18-20 minutes.
Remove from the oven and cool completely.