"Cut-out sourdough sugar cookies blend tangy sourdough discard with the sweet flavor of traditional sugar cookies. They bake perfectly with crisp, clean edges, yet have a soft tender bite."
Cream together the sugar and softened butter. Then add the sourdough discard, egg, vanilla extract, and salt Sift in the flour and cornstarch, mixing until a smooth dough forms.
Turn the cookie dough onto a well floured work surface and roll it to a thickness of 1/4 inch. Then, use cookie cutters to cut out as many cookies as the space allows.
Arrange the cut cookies on a parchment lined baking sheet and bake at 350°F for 9-11 minutes. Once done, transfer the cookies to a cooling rack and let them cool for 15 minutes.
To make the frosting combine the water, vanilla, and powdered sugar in a medium sized mixing bowl. Add food coloring i desired and frost the cookies once cooled.