Within the field of “fair division” problem solving—which sits at the crossroads of mathematics, political science, and economics—cake is more than just a dessert. Cake is an apartment building with rooms to be assigned to picky housemates. Cake is a high stakes divorce settlement. Cake is a war-torn country. Since the 17th century, theorists have been devising methods to divvy up the things we all want in ways that obey both the rigid formalism of mathematics and our more subjective notions of fairness. All the while, cake has been used as a powerful metaphor for all that is good, finite, and divisible in the world.