Whether you're celebrating Pi Day or the end of your math final, these Pi Symbol Cookies are top of their class. Containing as many characters as can fit of the Pi number, these roll-out cookies are great for number nerds and geometry geeks. Use the Rosanna Pansino Pi Cookie Cutter to cut out your cookie shapes, or use the cutter to cut Pi shapes out of pie dough for a fun decoration on your cream or fruit pie.