Oven Temp: 325
Cook time: ~30 minutes
Mix the softened butter with the salt. Sift the flour and cornstarch together in a second bowl. Add the sugar into the butter mixture and mix well. Add the flour and mix until it forms a smooth dough. Prep a pan(in what every way you want, Oil, Butter, Or Parchment. ), and smooth the dough into it. Cook. Take out and sprinkle sugar onto the shortbread. Cut out the shortbread, but do not remove. Chill thoroughly before removing.