Candy Cane Cookies

Name: Candy Cane Cookies
Ingredients: 1 sticks cold unsalted butter (room temperature); 1 cup granulated sugar; 1 lrg egg (room temperature); 1/2 teaspoon vanilla extract; 1/2 teaspoon peppermint extract; 1/4 teaspoon course salt; 2 1/2 cups unbleached all purpose flour (plus more for dusting); red gel food coloring; 1 lrg egg white (beaten); course sanding sugar (for decorating)