What is the solute of whipped cream?

The solute in whipped cream is fat.

Whipped cream is made by whipping heavy cream until it becomes light and fluffy. Heavy cream contains a high percentage of fat, which is what gives it its rich and creamy texture. When the cream is whipped, the air bubbles that are incorporated into it give it its characteristic light and fluffy texture. The fat in the cream also helps to stabilize the whipped cream and prevent it from deflating.