Peach Foam

This historical dessert relies on mechanical incorporation of air bubbles stabilized by egg white proteins. The powdered sugar dissolves quickly in the fruit puree, creating a viscous medium that helps trap air during beating. Egg whites provide albumin proteins that denature and unfold during whipping, forming a network around air bubbles to create stable foam. The extended beating time (10-15 minutes) is crucial for achieving maximum volume and creating small, uniform air cells that result in a light, mousse-like texture without any heat or gelatin.