Sandwich King: Down Home Southern Sandwiches

What makes desserts sweet? Usually it's sugar, but in the desert, it's agave. For this pre-heat, the five bakers must use only agave as the sweetener in an assigned dessert -- a tart, a flourless cake, an ice cream sandwich, a doughnut or a cupcake. For the main heat, the bakers make succulent cakes that rival the real thing.